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Chemistry Regents Answers

Chemistry Regents answers for independent study: review 86 multiple-choice questions from past Physical Setting/Chemistry Regents exams, each answer taken from the NYSED rating guide on nysedregents.org. Questions that need a diagram are left out.

Multiple-choice questions from the June 2015 and June 2016 New York State Regents Examinations in Physical Setting/Chemistry (Parts A and B-1): atomic structure, the periodic table, bonding, moles and stoichiometry, gases, solutions, kinetics and equilibrium, organic chemistry, acids and bases, redox and nuclear chemistry. Each answer is the NYSED scoring key for that examination; questions that need a diagram or graph are left out. Some questions assume the Reference Tables for Physical Setting/Chemistry.

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🃏 Flashcards
01Which statement describes the charge of an electron and the charge of a proton? A. An electron and a proton both have a charge of +1. B. An electron and a proton both have a charge of −1. C. An electron has a charge of +1, and a proton has a charge of −1. D. An electron has a charge of −1, and a proton has a charge of +1.
A:

D. An electron has a charge of −1, and a proton has a charge of +1. (NYSED rating guide, June 2016 Regents Chemistry, question 1: choice (4))

VERIFIED AGAINST THE SOURCE

“Which statement describes the charge of an electron and the charge of a proton? (1) An electron and a proton both have a charge of +1. (2) An electron and a proton both have a charge of −1. (3) An electron has a charge of +1, and a proton has a charge of −1. (4) An electron has a charge of −1, and a proton has a charge of +1.”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 1 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
02Which subatomic particles are found in the nucleus of an atom of beryllium? A. electrons and protons B. electrons and positrons C. neutrons and protons D. neutrons and electrons
A:

C. neutrons and protons (NYSED rating guide, June 2016 Regents Chemistry, question 2: choice (3))

VERIFIED AGAINST THE SOURCE

“Which subatomic particles are found in the nucleus of an atom of beryllium? (1) electrons and protons (2) electrons and positrons (3) neutrons and protons (4) neutrons and electrons”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 2 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
03The elements in Period 4 on the Periodic Table are arranged in order of increasing A. atomic radius B. atomic number C. number of valence electrons D. number of occupied shells of electrons
A:

B. atomic number (NYSED rating guide, June 2016 Regents Chemistry, question 3: choice (2))

VERIFIED AGAINST THE SOURCE

“The elements in Period 4 on the Periodic Table are arranged in order of increasing (1) atomic radius (2) atomic number (3) number of valence electrons (4) number of occupied shells of electrons”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 3 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
04Which phrase describes two forms of solid carbon, diamond and graphite, at STP? A. the same crystal structure and the same properties B. the same crystal structure and different properties C. different crystal structures and the same properties D. different crystal structures and different properties
A:

D. different crystal structures and different properties (NYSED rating guide, June 2016 Regents Chemistry, question 4: choice (4))

VERIFIED AGAINST THE SOURCE

“Which phrase describes two forms of solid carbon, diamond and graphite, at STP? (1) the same crystal structure and the same properties (2) the same crystal structure and different properties (3) different crystal structures and the same properties (4) different crystal structures and different properties”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 4 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
05Which element has six valence electrons in each of its atoms in the ground state? A. Se B. As C. Kr D. Ga
A:

A. Se (NYSED rating guide, June 2016 Regents Chemistry, question 5: choice (1))

VERIFIED AGAINST THE SOURCE

“Which element has six valence electrons in each of its atoms in the ground state? (1) Se (3) Kr (2) As (4) Ga”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 5 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
06What is the chemical name for H2SO3(aq)? A. sulfuric acid B. sulfurous acid C. hydrosulfuric acid D. hydrosulfurous acid
A:

B. sulfurous acid (NYSED rating guide, June 2016 Regents Chemistry, question 6: choice (2))

VERIFIED AGAINST THE SOURCE

“What is the chemical name for H2SO3(aq)? (1) sulfuric acid (2) sulfurous acid (3) hydrosulfuric acid (4) hydrosulfurous acid”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 6 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
07Which substance is most soluble in water? A. (NH4)3PO4 B. Cu(OH)2 C. Ag2SO4 D. CaCO3
A:

A. (NH4)3PO4 (NYSED rating guide, June 2016 Regents Chemistry, question 7: choice (1))

VERIFIED AGAINST THE SOURCE

“Which substance is most soluble in water? (1) (NH4)3PO4 (3) Ag2SO4 (2) Cu(OH)2 (4) CaCO3”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 7 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
08Which type of bonding is present in a sample of an element that is malleable? A. ionic B. metallic C. nonpolar covalent D. polar covalent
A:

B. metallic (NYSED rating guide, June 2016 Regents Chemistry, question 8: choice (2))

VERIFIED AGAINST THE SOURCE

“Which type of bonding is present in a sample of an element that is malleable? (1) ionic (3) nonpolar covalent (2) metallic (4) polar covalent”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 8 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
09Which atom has the greatest attraction for the electrons in a chemical bond? A. hydrogen B. oxygen C. silicon D. sulfur
A:

B. oxygen (NYSED rating guide, June 2016 Regents Chemistry, question 9: choice (2))

VERIFIED AGAINST THE SOURCE

“Which atom has the greatest attraction for the electrons in a chemical bond? (1) hydrogen (3) silicon (2) oxygen (4) sulfur”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 9 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
10Which type of reaction involves the transfer of electrons? A. alpha decay B. double replacement C. neutralization D. oxidation-reduction
A:

D. oxidation-reduction (NYSED rating guide, June 2016 Regents Chemistry, question 10: choice (4))

VERIFIED AGAINST THE SOURCE

“Which type of reaction involves the transfer of electrons? (1) alpha decay (2) double replacement (3) neutralization (4) oxidation-reduction”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 10 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
11A 10.0-gram sample of nitrogen is at STP. Which property will increase when the sample is cooled to 72 K at standard pressure? A. mass B. volume C. density D. temperature
A:

C. density (NYSED rating guide, June 2016 Regents Chemistry, question 11: choice (3))

VERIFIED AGAINST THE SOURCE

“A 10.0-gram sample of nitrogen is at STP. Which property will increase when the sample is cooled to 72 K at standard pressure? (1) mass (3) density (2) volume (4) temperature”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 11 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
12Which element is a gas at STP? A. sulfur B. xenon C. potassium D. phosphorus
A:

B. xenon (NYSED rating guide, June 2016 Regents Chemistry, question 12: choice (2))

VERIFIED AGAINST THE SOURCE

“Which element is a gas at STP? (1) sulfur (3) potassium (2) xenon (4) phosphorus”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 12 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
13A 5.0-gram sample of Fe(s) is to be placed in 100. milliliters of HCl(aq). Which changes will result in the fastest rate of reaction? A. increasing the surface area of Fe(s) and increasing the concentration of HCl(aq) B. increasing the surface area of Fe(s) and decreasing the concentration of HCl(aq) C. decreasing the surface area of Fe(s) and increasing the concentration of HCl(aq) D. decreasing the surface area of Fe(s) and decreasing the concentration of HCl(aq)
A:

A. increasing the surface area of Fe(s) and increasing the concentration of HCl(aq) (NYSED rating guide, June 2016 Regents Chemistry, question 13: choice (1))

VERIFIED AGAINST THE SOURCE

“A 5.0-gram sample of Fe(s) is to be placed in 100. milliliters of HCl(aq). Which changes will result in the fastest rate of reaction? (1) increasing the surface area of Fe(s) and increasing the concentration of HCl(aq) (2) increasing the surface area of Fe(s) and decreasing the concentration of HCl(aq) (3) decreasing the surface area of Fe(s) and increasing the concentration of HCl(aq) (4) decreasing the surface area of Fe(s) and decreasing the concentration of HCl(aq)”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 13 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
14Which process is commonly used to separate a mixture of ethanol and water? A. distillation B. ionization C. filtration D. titration
A:

A. distillation (NYSED rating guide, June 2016 Regents Chemistry, question 14: choice (1))

VERIFIED AGAINST THE SOURCE

“Which process is commonly used to separate a mixture of ethanol and water? (1) distillation (3) filtration (2) ionization (4) titration”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 14 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
15A sample of hydrogen gas will behave most like an ideal gas under the conditions of A. low pressure and low temperature B. low pressure and high temperature C. high pressure and low temperature D. high pressure and high temperature
A:

B. low pressure and high temperature (NYSED rating guide, June 2016 Regents Chemistry, question 15: choice (2))

VERIFIED AGAINST THE SOURCE

“A sample of hydrogen gas will behave most like an ideal gas under the conditions of (1) low pressure and low temperature (2) low pressure and high temperature (3) high pressure and low temperature (4) high pressure and high temperature”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 15 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
16The collision theory states that a reaction is most likely to occur when the reactant particles collide with the proper A. formula masses B. molecular masses C. density and volume D. energy and orientation
A:

D. energy and orientation (NYSED rating guide, June 2016 Regents Chemistry, question 16: choice (4))

VERIFIED AGAINST THE SOURCE

“The collision theory states that a reaction is most likely to occur when the reactant particles collide with the proper (1) formula masses (2) molecular masses (3) density and volume (4) energy and orientation”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 16 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
17At STP, which sample contains the same number of molecules as 3.0 liters of H2(g)? A. 1.5 L of NH3(g) B. 2.0 L of CO2(g) C. 3.0 L of CH4(g) D. 6.0 L of N2(g)
A:

C. 3.0 L of CH4(g) (NYSED rating guide, June 2016 Regents Chemistry, question 17: choice (3))

VERIFIED AGAINST THE SOURCE

“At STP, which sample contains the same number of molecules as 3.0 liters of H2(g)? (1) 1.5 L of NH3(g) (3) 3.0 L of CH4(g) (2) 2.0 L of CO2(g) (4) 6.0 L of N2(g)”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 17 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
18The addition of a catalyst to a chemical reaction provides an alternate pathway that A. increases the potential energy of reactants B. decreases the potential energy of reactants C. increases the activation energy D. decreases the activation energy
A:

D. decreases the activation energy (NYSED rating guide, June 2016 Regents Chemistry, question 18: choice (4))

VERIFIED AGAINST THE SOURCE

“The addition of a catalyst to a chemical reaction provides an alternate pathway that (1) increases the potential energy of reactants (2) decreases the potential energy of reactants (3) increases the activation energy (4) decreases the activation energy”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 18 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
19A sample of water is boiling as heat is added at a constant rate. Which statement describes the potential energy and the average kinetic energy of the water molecules in this sample? A. The potential energy decreases and the average kinetic energy remains the same. B. The potential energy decreases and the average kinetic energy increases. C. The potential energy increases and the average kinetic energy remains the same. D. The potential energy increases and the average kinetic energy increases.
A:

C. The potential energy increases and the average kinetic energy remains the same. (NYSED rating guide, June 2016 Regents Chemistry, question 19: choice (3))

VERIFIED AGAINST THE SOURCE

“A sample of water is boiling as heat is added at a constant rate. Which statement describes the potential energy and the average kinetic energy of the water molecules in this sample? (1) The potential energy decreases and the average kinetic energy remains the same. (2) The potential energy decreases and the average kinetic energy increases. (3) The potential energy increases and the average kinetic energy remains the same. (4) The potential energy increases and the average kinetic energy increases.”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 19 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
20Entropy is a measure of the A. acidity of a sample B. disorder of a system C. concentration of a solution D. chemical activity of an element
A:

B. disorder of a system (NYSED rating guide, June 2016 Regents Chemistry, question 20: choice (2))

VERIFIED AGAINST THE SOURCE

“Entropy is a measure of the (1) acidity of a sample (2) disorder of a system (3) concentration of a solution (4) chemical activity of an element”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 20 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
21Which element has atoms that can bond with each other to form ring, chain, and network structures? A. aluminum B. calcium C. carbon D. argon
A:

C. carbon (NYSED rating guide, June 2016 Regents Chemistry, question 21: choice (3))

VERIFIED AGAINST THE SOURCE

“Which element has atoms that can bond with each other to form ring, chain, and network structures? (1) aluminum (3) carbon (2) calcium (4) argon”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 21 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
22What is the number of electrons shared in the multiple carbon-carbon bond in one molecule of 1-pentyne? A. 6 B. 2 C. 3 D. 8
A:

A. 6 (NYSED rating guide, June 2016 Regents Chemistry, question 22: choice (1))

VERIFIED AGAINST THE SOURCE

“What is the number of electrons shared in the multiple carbon-carbon bond in one molecule of 1-pentyne? (1) 6 (3) 3 (2) 2 (4) 8”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 22 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
23Butanal, butanone, and diethyl ether have different properties because the molecules of each compound differ in their A. numbers of carbon atoms B. numbers of oxygen atoms C. types of functional groups D. types of radioactive isotopes
A:

C. types of functional groups (NYSED rating guide, June 2016 Regents Chemistry, question 23: choice (3))

VERIFIED AGAINST THE SOURCE

“Butanal, butanone, and diethyl ether have different properties because the molecules of each compound differ in their (1) numbers of carbon atoms (2) numbers of oxygen atoms (3) types of functional groups (4) types of radioactive isotopes”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 23 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
24What occurs when a magnesium atom becomes a magnesium ion? A. Electrons are gained and the oxidation number increases. B. Electrons are gained and the oxidation number decreases. C. Electrons are lost and the oxidation number increases. D. Electrons are lost and the oxidation number decreases.
A:

C. Electrons are lost and the oxidation number increases. (NYSED rating guide, June 2016 Regents Chemistry, question 24: choice (3))

VERIFIED AGAINST THE SOURCE

“What occurs when a magnesium atom becomes a magnesium ion? (1) Electrons are gained and the oxidation number increases. (2) Electrons are gained and the oxidation number decreases. (3) Electrons are lost and the oxidation number increases. (4) Electrons are lost and the oxidation number decreases.”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 24 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
25Energy is required to produce a chemical change during A. chromatography B. electrolysis C. boiling D. melting
A:

B. electrolysis (NYSED rating guide, June 2016 Regents Chemistry, question 25: choice (2))

VERIFIED AGAINST THE SOURCE

“Energy is required to produce a chemical change during (1) chromatography (3) boiling (2) electrolysis (4) melting”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 25 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
26The reaction of an Arrhenius acid with an Arrhenius base produces water and A. a salt B. an ester C. an aldehyde D. a halocarbon
A:

A. a salt (NYSED rating guide, June 2016 Regents Chemistry, question 26: choice (1))

VERIFIED AGAINST THE SOURCE

“The reaction of an Arrhenius acid with an Arrhenius base produces water and (1) a salt (3) an aldehyde (2) an ester (4) a halocarbon”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 26 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
27One acid-base theory defines an acid as an A. H⁻ acceptor B. H⁻ donor C. H⁺ acceptor D. H⁺ donor
A:

D. H⁺ donor (NYSED rating guide, June 2016 Regents Chemistry, question 27: choice (4))

VERIFIED AGAINST THE SOURCE

“One acid-base theory defines an acid as an (1) H− acceptor (3) H+ acceptor (2) H− donor (4) H+ donor”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 27 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
28Which phrase describes the decay modes and the half-lives of K-37 and K-42? A. the same decay mode but different half-lives B. the same decay mode and the same half-life C. different decay modes and different half-lives D. different decay modes but the same half-life
A:

C. different decay modes and different half-lives (NYSED rating guide, June 2016 Regents Chemistry, question 28: choice (3))

VERIFIED AGAINST THE SOURCE

“Which phrase describes the decay modes and the half-lives of K-37 and K-42? (1) the same decay mode but different half-lives (2) the same decay mode and the same half-life (3) different decay modes and different half-lives (4) different decay modes but the same half-life”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 28 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
29Which particle has a mass that is approximately equal to the mass of a proton? A. an alpha particle B. a beta particle C. a neutron D. a positron
A:

C. a neutron (NYSED rating guide, June 2016 Regents Chemistry, question 29: choice (3))

VERIFIED AGAINST THE SOURCE

“Which particle has a mass that is approximately equal to the mass of a proton? (1) an alpha particle (3) a neutron (2) a beta particle (4) a positron”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 29 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
30Which change occurs during a nuclear fission reaction? A. Covalent bonds are converted to ionic bonds. B. Isotopes are converted to isomers. C. Temperature is converted to mass. D. Matter is converted to energy.
A:

D. Matter is converted to energy. (NYSED rating guide, June 2016 Regents Chemistry, question 30: choice (4))

VERIFIED AGAINST THE SOURCE

“Which change occurs during a nuclear fission reaction? (1) Covalent bonds are converted to ionic bonds. (2) Isotopes are converted to isomers. (3) Temperature is converted to mass. (4) Matter is converted to energy.”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 30 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
31Compared to an electron, which particle has a charge that is equal in magnitude but opposite in sign? A. an alpha particle B. a beta particle C. a neutron D. a proton
A:

D. a proton (NYSED rating guide, June 2015 Regents Chemistry, question 1: choice (4))

VERIFIED AGAINST THE SOURCE

“Compared to an electron, which particle has a charge that is equal in magnitude but opposite in sign? (1) an alpha particle (3) a neutron (2) a beta particle (4) a proton”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 1 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
32The mass of a proton is approximately equal to A. 1 atomic mass unit B. 12 atomic mass units C. the mass of 1 mole of carbon atoms D. the mass of 12 moles of electrons
A:

A. 1 atomic mass unit (NYSED rating guide, June 2015 Regents Chemistry, question 2: choice (1))

VERIFIED AGAINST THE SOURCE

“The mass of a proton is approximately equal to (1) 1 atomic mass unit (2) 12 atomic mass units (3) the mass of 1 mole of carbon atoms (4) the mass of 12 moles of electrons”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 2 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
33Which property decreases when the elements in Group 17 are considered in order of increasing atomic number? A. atomic mass B. atomic radius C. melting point D. electronegativity
A:

D. electronegativity (NYSED rating guide, June 2015 Regents Chemistry, question 3: choice (4))

VERIFIED AGAINST THE SOURCE

“Which property decreases when the elements in Group 17 are considered in order of increasing atomic number? (1) atomic mass (3) melting point (2) atomic radius (4) electronegativity”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 3 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
34Any substance composed of two or more elements that are chemically combined in a fixed proportion is A. an isomer B. an isotope C. a solution D. a compound
A:

D. a compound (NYSED rating guide, June 2015 Regents Chemistry, question 4: choice (4))

VERIFIED AGAINST THE SOURCE

“Any substance composed of two or more elements that are chemically combined in a fixed proportion is (1) an isomer (3) a solution (2) an isotope (4) a compound”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 4 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
35Which term refers to how strongly an atom of an element attracts electrons in a chemical bond with an atom of a different element? A. entropy B. electronegativity C. activation energy D. first ionization energy
A:

B. electronegativity (NYSED rating guide, June 2015 Regents Chemistry, question 5: choice (2))

VERIFIED AGAINST THE SOURCE

“Which term refers to how strongly an atom of an element attracts electrons in a chemical bond with an atom of a different element? (1) entropy (2) electronegativity (3) activation energy (4) first ionization energy”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 5 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
36At STP, which substance has metallic bonding? A. ammonium chloride B. barium oxide C. iodine D. silver
A:

D. silver (NYSED rating guide, June 2015 Regents Chemistry, question 6: choice (4))

VERIFIED AGAINST THE SOURCE

“At STP, which substance has metallic bonding? (1) ammonium chloride (3) iodine (2) barium oxide (4) silver”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 6 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
37What is the number of electrons shared between the carbon atoms in a molecule of ethyne? A. 6 B. 2 C. 8 D. 4
A:

A. 6 (NYSED rating guide, June 2015 Regents Chemistry, question 7: choice (1))

VERIFIED AGAINST THE SOURCE

“What is the number of electrons shared between the carbon atoms in a molecule of ethyne? (1) 6 (3) 8 (2) 2 (4) 4”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 7 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
38Which atom in the ground state has a stable valence electron configuration? A. Ar B. Al C. Si D. Na
A:

A. Ar (NYSED rating guide, June 2015 Regents Chemistry, question 8: choice (1))

VERIFIED AGAINST THE SOURCE

“Which atom in the ground state has a stable valence electron configuration? (1) Ar (3) Si (2) Al (4) Na”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 8 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
39What occurs when two fluorine atoms react to produce a fluorine molecule? A. Energy is absorbed as a bond is broken. B. Energy is absorbed as a bond is formed. C. Energy is released as a bond is broken. D. Energy is released as a bond is formed.
A:

D. Energy is released as a bond is formed. (NYSED rating guide, June 2015 Regents Chemistry, question 9: choice (4))

VERIFIED AGAINST THE SOURCE

“What occurs when two fluorine atoms react to produce a fluorine molecule? (1) Energy is absorbed as a bond is broken. (2) Energy is absorbed as a bond is formed. (3) Energy is released as a bond is broken. (4) Energy is released as a bond is formed.”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 9 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
40Which gas sample at STP has the same number of molecules as a 2.0-liter sample of Cl2(g) at STP? A. 1.0 L of NH3(g) B. 2.0 L of CH4(g) C. 3.0 L of CO2(g) D. 4.0 L of NO(g)
A:

B. 2.0 L of CH4(g) (NYSED rating guide, June 2015 Regents Chemistry, question 10: choice (2))

VERIFIED AGAINST THE SOURCE

“Which gas sample at STP has the same number of molecules as a 2.0-liter sample of Cl2(g) at STP? (1) 1.0 L of NH3(g) (3) 3.0 L of CO2(g) (2) 2.0 L of CH4(g) (4) 4.0 L of NO(g)”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 10 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
41All atoms of uranium have the same A. mass number B. atomic number C. number of neutrons plus protons D. number of neutrons plus electrons
A:

B. atomic number (NYSED rating guide, June 2015 Regents Chemistry, question 11: choice (2))

VERIFIED AGAINST THE SOURCE

“All atoms of uranium have the same (1) mass number (2) atomic number (3) number of neutrons plus protons (4) number of neutrons plus electrons”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 11 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
42The concentration of a solution can be expressed in A. kelvins B. milliliters C. joules per kilogram D. moles per liter
A:

D. moles per liter (NYSED rating guide, June 2015 Regents Chemistry, question 12: choice (4))

VERIFIED AGAINST THE SOURCE

“The concentration of a solution can be expressed in (1) kelvins (2) milliliters (3) joules per kilogram (4) moles per liter”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 12 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
43Compared to the boiling point and the freezing point of water at 1 atmosphere, a 1.0 M CaCl2(aq) solution at 1 atmosphere has a A. lower boiling point and a lower freezing point B. lower boiling point and a higher freezing point C. higher boiling point and a lower freezing point D. higher boiling point and higher freezing point
A:

C. higher boiling point and a lower freezing point (NYSED rating guide, June 2015 Regents Chemistry, question 13: choice (3))

VERIFIED AGAINST THE SOURCE

“Compared to the boiling point and the freezing point of water at 1 atmosphere, a 1.0 M CaCl2(aq) solution at 1 atmosphere has a (1) lower boiling point and a lower freezing point (2) lower boiling point and a higher freezing point (3) higher boiling point and a lower freezing point (4) higher boiling point and higher freezing point”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 13 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
44According to the kinetic molecular theory, which statement describes an ideal gas? A. The gas particles are diatomic. B. Energy is created when the gas particles collide. C. There are no attractive forces between the gas particles. D. The distance between the gas particles is small, compared to their size.
A:

C. There are no attractive forces between the gas particles. (NYSED rating guide, June 2015 Regents Chemistry, question 14: choice (3))

VERIFIED AGAINST THE SOURCE

“According to the kinetic molecular theory, which statement describes an ideal gas? (1) The gas particles are diatomic. (2) Energy is created when the gas particles collide. (3) There are no attractive forces between the gas particles. (4) The distance between the gas particles is small, compared to their size.”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 14 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
45Which physical change is endothermic? A. CO2(s) → CO2(g) B. CO2(ℓ) → CO2(s) C. CO2(g) → CO2(ℓ) D. CO2(g) → CO2(s)
A:

A. CO2(s) → CO2(g) (NYSED rating guide, June 2015 Regents Chemistry, question 15: choice (1))

VERIFIED AGAINST THE SOURCE

“Which physical change is endothermic? (1) CO2(s) → CO2(g) (3) CO2(g) → CO2(ℓ) (2) CO2(ℓ) → CO2(s) (4) CO2(g) → CO2(s)”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 15 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
46Which Group 16 element combines with hydrogen to form a compound that has the strongest hydrogen bonding between its molecules? A. oxygen B. selenium C. sulfur D. tellurium
A:

A. oxygen (NYSED rating guide, June 2015 Regents Chemistry, question 16: choice (1))

VERIFIED AGAINST THE SOURCE

“Which Group 16 element combines with hydrogen to form a compound that has the strongest hydrogen bonding between its molecules? (1) oxygen (3) sulfur (2) selenium (4) tellurium”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 16 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
47Hydrocarbons are composed of the elements A. carbon and hydrogen, only B. carbon and oxygen, only C. carbon, hydrogen, and oxygen D. carbon, nitrogen, and oxygen
A:

A. carbon and hydrogen, only (NYSED rating guide, June 2015 Regents Chemistry, question 17: choice (1))

VERIFIED AGAINST THE SOURCE

“Hydrocarbons are composed of the elements (1) carbon and hydrogen, only (2) carbon and oxygen, only (3) carbon, hydrogen, and oxygen (4) carbon, nitrogen, and oxygen”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 17 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
48Which atom is bonded to the carbon atom in the functional group of a ketone? A. fluorine B. hydrogen C. nitrogen D. oxygen
A:

D. oxygen (NYSED rating guide, June 2015 Regents Chemistry, question 18: choice (4))

VERIFIED AGAINST THE SOURCE

“Which atom is bonded to the carbon atom in the functional group of a ketone? (1) fluorine (3) nitrogen (2) hydrogen (4) oxygen”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 18 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
49Two types of organic reactions are A. addition and sublimation B. deposition and saponification C. decomposition and evaporation D. esterification and polymerization
A:

D. esterification and polymerization (NYSED rating guide, June 2015 Regents Chemistry, question 19: choice (4))

VERIFIED AGAINST THE SOURCE

“Two types of organic reactions are (1) addition and sublimation (2) deposition and saponification (3) decomposition and evaporation (4) esterification and polymerization”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 19 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
50The isomers butane and methylpropane have A. the same molecular formula and the same properties B. the same molecular formula and different properties C. different molecular formulas and the same properties D. different molecular formulas and different properties
A:

B. the same molecular formula and different properties (NYSED rating guide, June 2015 Regents Chemistry, question 20: choice (2))

VERIFIED AGAINST THE SOURCE

“The isomers butane and methylpropane have (1) the same molecular formula and the same properties (2) the same molecular formula and different properties (3) different molecular formulas and the same properties (4) different molecular formulas and different properties”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 20 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
51In a redox reaction, which particles are lost and gained in equal numbers? A. electrons B. neutrons C. hydroxide ions D. hydronium ions
A:

A. electrons (NYSED rating guide, June 2015 Regents Chemistry, question 21: choice (1))

VERIFIED AGAINST THE SOURCE

“In a redox reaction, which particles are lost and gained in equal numbers? (1) electrons (3) hydroxide ions (2) neutrons (4) hydronium ions”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 21 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
52What is the oxidation state for a Mn atom? A. 0 B. +7 C. +3 D. +4
A:

A. 0 (NYSED rating guide, June 2015 Regents Chemistry, question 22: choice (1))

VERIFIED AGAINST THE SOURCE

“What is the oxidation state for a Mn atom? (1) 0 (3) +3 (2) +7 (4) +4”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 22 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
53Which compounds are classified as electrolytes? A. KNO3 and H2SO4 B. KNO3 and CH3OH C. CH3OCH3 and H2SO4 D. CH3OCH3 and CH3OH
A:

A. KNO3 and H2SO4 (NYSED rating guide, June 2015 Regents Chemistry, question 23: choice (1))

VERIFIED AGAINST THE SOURCE

“Which compounds are classified as electrolytes? (1) KNO3 and H2SO4 (2) KNO3 and CH3OH (3) CH3OCH3 and H2SO4 (4) CH3OCH3 and CH3OH”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 23 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
54Which compound is an Arrhenius base? A. CO2 B. CaSO4 C. Ca(OH)2 D. C2H5OH
A:

C. Ca(OH)2 (NYSED rating guide, June 2015 Regents Chemistry, question 24: choice (3))

VERIFIED AGAINST THE SOURCE

“Which compound is an Arrhenius base? (1) CO2 (3) Ca(OH)2 (2) CaSO4 (4) C2H5OH”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 24 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
55According to one acid-base theory, a water molecule acts as a base when it accepts A. an H⁺ ion B. an OH⁻ ion C. a neutron D. an electron
A:

A. an H⁺ ion (NYSED rating guide, June 2015 Regents Chemistry, question 25: choice (1))

VERIFIED AGAINST THE SOURCE

“According to one acid-base theory, a water molecule acts as a base when it accepts (1) an H+ ion (3) a neutron (2) an OH− ion (4) an electron”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 25 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
56Given the equation representing a system at equilibrium: N2(g) + 3H2(g) ⇌ 2NH3(g) Which statement describes this reaction at equilibrium? A. The concentration of N2(g) decreases. B. The concentration of N2(g) is constant. C. The rate of the reverse reaction decreases. D. The rate of the reverse reaction increases.
A:

B. The concentration of N2(g) is constant. (NYSED rating guide, June 2015 Regents Chemistry, question 26: choice (2))

VERIFIED AGAINST THE SOURCE

“Given the equation representing a system at equilibrium: N2(g) + 3H2(g) ⇌ 2NH3(g) Which statement describes this reaction at equilibrium? (1) The concentration of N2(g) decreases. (2) The concentration of N2(g) is constant. (3) The rate of the reverse reaction decreases. (4) The rate of the reverse reaction increases.”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 26 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
57The acidity or alkalinity of an unknown aqueous solution is indicated by its A. pH value B. electronegativity value C. percent by mass concentration D. percent by volume concentration
A:

A. pH value (NYSED rating guide, June 2015 Regents Chemistry, question 27: choice (1))

VERIFIED AGAINST THE SOURCE

“The acidity or alkalinity of an unknown aqueous solution is indicated by its (1) pH value (2) electronegativity value (3) percent by mass concentration (4) percent by volume concentration”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 27 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
58The laboratory process in which the volume of a solution of known concentration is used to determine the concentration of another solution is called A. distillation B. fermentation C. titration D. transmutation
A:

C. titration (NYSED rating guide, June 2015 Regents Chemistry, question 28: choice (3))

VERIFIED AGAINST THE SOURCE

“The laboratory process in which the volume of a solution of known concentration is used to determine the concentration of another solution is called (1) distillation (3) titration (2) fermentation (4) transmutation”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 28 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
59Which list of nuclear emissions is arranged in order from the greatest penetrating power to the least penetrating power? A. alpha particle, beta particle, gamma ray B. alpha particle, gamma ray, beta particle C. gamma ray, alpha particle, beta particle D. gamma ray, beta particle, alpha particle
A:

D. gamma ray, beta particle, alpha particle (NYSED rating guide, June 2015 Regents Chemistry, question 29: choice (4))

VERIFIED AGAINST THE SOURCE

“Which list of nuclear emissions is arranged in order from the greatest penetrating power to the least penetrating power? (1) alpha particle, beta particle, gamma ray (2) alpha particle, gamma ray, beta particle (3) gamma ray, alpha particle, beta particle (4) gamma ray, beta particle, alpha particle”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 29 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
60Which electron shell contains the valence electrons of a radium atom in the ground state? A. the sixth shell B. the second shell C. the seventh shell D. the eighteenth shell
A:

C. the seventh shell (NYSED rating guide, June 2015 Regents Chemistry, question 31: choice (3))

VERIFIED AGAINST THE SOURCE

“Which electron shell contains the valence electrons of a radium atom in the ground state? (1) the sixth shell (3) the seventh shell (2) the second shell (4) the eighteenth shell”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 31 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
61Which list of symbols represents nonmetals, only? A. B, Al, Ga B. Li, Be, B C. C, Si, Ge D. P, S, Cl
A:

D. P, S, Cl (NYSED rating guide, June 2016 Regents Chemistry, question 33: choice (4))

VERIFIED AGAINST THE SOURCE

“Which list of symbols represents nonmetals, only? (1) B, Al, Ga (3) C, Si, Ge (2) Li, Be, B (4) P, S, Cl”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 33 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
62In the formula XSO4, the symbol X could represent the element A. Al B. Ar C. Mg D. Na
A:

C. Mg (NYSED rating guide, June 2016 Regents Chemistry, question 34: choice (3))

VERIFIED AGAINST THE SOURCE

“In the formula XSO4, the symbol X could represent the element (1) Al (3) Mg (2) Ar (4) Na”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 34 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
63What is the chemical formula for lead(IV) oxide? A. PbO2 B. PbO4 C. Pb2O D. Pb4O
A:

A. PbO2 (NYSED rating guide, June 2016 Regents Chemistry, question 35: choice (1))

VERIFIED AGAINST THE SOURCE

“What is the chemical formula for lead(IV) oxide? (1) PbO2 (3) Pb2O (2) PbO4 (4) Pb4O”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 35 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
64Which statement describes the general trends in electronegativity and atomic radius as the elements in Period 2 are considered in order from left to right? A. Both electronegativity and atomic radius increase. B. Both electronegativity and atomic radius decrease. C. Electronegativity increases and atomic radius decreases. D. Electronegativity decreases and atomic radius increases.
A:

C. Electronegativity increases and atomic radius decreases. (NYSED rating guide, June 2016 Regents Chemistry, question 36: choice (3))

VERIFIED AGAINST THE SOURCE

“Which statement describes the general trends in electronegativity and atomic radius as the elements in Period 2 are considered in order from left to right? (1) Both electronegativity and atomic radius increase. (2) Both electronegativity and atomic radius decrease. (3) Electronegativity increases and atomic radius decreases. (4) Electronegativity decreases and atomic radius increases.”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 36 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
65What is the percent composition by mass of nitrogen in (NH4)2CO3 (gram-formula mass = 96.0 g/mol)? A. 14.6% B. 29.2% C. 58.4% D. 87.5%
A:

B. 29.2% (NYSED rating guide, June 2016 Regents Chemistry, question 37: choice (2))

VERIFIED AGAINST THE SOURCE

“What is the percent composition by mass of nitrogen in (NH4)2CO3 (gram-formula mass = 96.0 g/mol)? (1) 14.6% (3) 58.4% (2) 29.2% (4) 87.5%”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 37 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
66Given the balanced equation 2KI + F2 → 2KF + I2, which type of chemical reaction does this equation represent? A. synthesis B. decomposition C. single replacement D. double replacement
A:

C. single replacement (NYSED rating guide, June 2016 Regents Chemistry, question 38: choice (3))

VERIFIED AGAINST THE SOURCE

“Given the balanced equation: 2KI + F2 → 2KF + I2 Which type of chemical reaction does this equation represent? (1) synthesis (2) decomposition (3) single replacement (4) double replacement”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 38 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
67Given the balanced equation representing a reaction: 2H2O + energy → 2H2 + O2. Which statement describes the changes in energy and bonding for the reactant? A. Energy is absorbed as bonds in H2O are formed. B. Energy is absorbed as bonds in H2O are broken. C. Energy is released as bonds in H2O are formed. D. Energy is released as bonds in H2O are broken.
A:

B. Energy is absorbed as bonds in H2O are broken. (NYSED rating guide, June 2016 Regents Chemistry, question 41: choice (2))

VERIFIED AGAINST THE SOURCE

“Given the balanced equation representing a reaction: 2H2O + energy → 2H2 + O2 Which statement describes the changes in energy and bonding for the reactant? (1) Energy is absorbed as bonds in H2O are formed. (2) Energy is absorbed as bonds in H2O are broken. (3) Energy is released as bonds in H2O are formed. (4) Energy is released as bonds in H2O are broken.”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 41 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
68Which aqueous solution has the highest boiling point at standard pressure? A. 1.0 M KCl(aq) B. 1.0 M CaCl2(aq) C. 2.0 M KCl(aq) D. 2.0 M CaCl2(aq)
A:

D. 2.0 M CaCl2(aq) (NYSED rating guide, June 2016 Regents Chemistry, question 43: choice (4))

VERIFIED AGAINST THE SOURCE

“Which aqueous solution has the highest boiling point at standard pressure? (1) 1.0 M KCl(aq) (3) 2.0 M KCl(aq) (2) 1.0 M CaCl2(aq) (4) 2.0 M CaCl2(aq)”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 43 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
69Given the equation representing a system at equilibrium: KNO3(s) + energy ⇌ K⁺(aq) + NO3⁻(aq). Which change causes the equilibrium to shift? A. increasing pressure B. increasing temperature C. adding a noble gas D. adding a catalyst
A:

B. increasing temperature (NYSED rating guide, June 2016 Regents Chemistry, question 44: choice (2))

VERIFIED AGAINST THE SOURCE

“Given the equation representing a system at equilibrium: KNO3(s) + energy K+(aq) + NO3 −(aq) Which change causes the equilibrium to shift? (1) increasing pressure (2) increasing temperature (3) adding a noble gas (4) adding a catalyst”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 44 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
70Which hydrocarbon is saturated? A. C2H2 B. C3H4 C. C4H6 D. C4H10
A:

D. C4H10 (NYSED rating guide, June 2016 Regents Chemistry, question 45: choice (4))

VERIFIED AGAINST THE SOURCE

“Which hydrocarbon is saturated? (1) C2H2 (3) C4H6 (2) C3H4 (4) C4H10”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 45 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
71Which volume of 0.600 M H2SO4(aq) exactly neutralizes 100. milliliters of 0.300 M Ba(OH)2(aq)? A. 25.0 mL B. 50.0 mL C. 100. mL D. 200. mL
A:

B. 50.0 mL (NYSED rating guide, June 2016 Regents Chemistry, question 46: choice (2))

VERIFIED AGAINST THE SOURCE

“Which volume of 0.600 M H2SO4(aq) exactly neutralizes 100. milliliters of 0.300 M Ba(OH)2(aq)? (1) 25.0 mL (3) 100. mL (2) 50.0 mL (4) 200. mL”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 46 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
72Which substance is an electrolyte? A. O2 B. Xe C. C3H8 D. KNO3
A:

D. KNO3 (NYSED rating guide, June 2016 Regents Chemistry, question 49: choice (4))

VERIFIED AGAINST THE SOURCE

“Which substance is an electrolyte? (1) O2 (3) C3H8 (2) Xe (4) KNO3”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 49 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
73Which type of organic reaction produces both water and carbon dioxide? A. addition B. combustion C. esterification D. fermentation
A:

B. combustion (NYSED rating guide, June 2016 Regents Chemistry, question 50: choice (2))

VERIFIED AGAINST THE SOURCE

“Which type of organic reaction produces both water and carbon dioxide? (1) addition (3) esterification (2) combustion (4) fermentation”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 21, 2016, question 50 (nysedregents.org); answer from the June 2016 Scoring Key and Rating Guide ↗
74Chlorine and element X have similar chemical properties. An atom of element X could have an electron configuration of A. 2-2 B. 2-8-1 C. 2-8-8 D. 2-8-18-7
A:

D. 2-8-18-7 (NYSED rating guide, June 2015 Regents Chemistry, question 33: choice (4))

VERIFIED AGAINST THE SOURCE

“Chlorine and element X have similar chemical properties. An atom of element X could have an electron configuration of (1) 2-2 (3) 2-8-8 (2) 2-8-1 (4) 2-8-18-7”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 33 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
75Which group of elements contains a metalloid? A. Group 8 B. Group 2 C. Group 16 D. Group 18
A:

C. Group 16 (NYSED rating guide, June 2015 Regents Chemistry, question 34: choice (3))

VERIFIED AGAINST THE SOURCE

“Which group of elements contains a metalloid? (1) Group 8 (3) Group 16 (2) Group 2 (4) Group 18”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 34 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
76In the formula for the compound XCl4, the X could represent A. C B. H C. Mg D. Zn
A:

A. C (NYSED rating guide, June 2015 Regents Chemistry, question 36: choice (1))

VERIFIED AGAINST THE SOURCE

“In the formula for the compound XCl4, the X could represent (1) C (3) Mg (2) H (4) Zn”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 36 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
77The formula C2H4 can be classified as A. a structural formula, only B. a molecular formula, only C. both a structural formula and an empirical formula D. both a molecular formula and an empirical formula
A:

B. a molecular formula, only (NYSED rating guide, June 2015 Regents Chemistry, question 37: choice (2))

VERIFIED AGAINST THE SOURCE

“The formula C2H4 can be classified as (1) a structural formula, only (2) a molecular formula, only (3) both a structural formula and an empirical formula (4) both a molecular formula and an empirical formula”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 37 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
78Given the balanced equation representing a reaction: 4Al(s) + 3O2(g) → 2Al2O3(s). How many moles of Al(s) react completely with 4.50 moles of O2(g) to produce 3.00 moles of Al2O3(s)? A. 1.50 mol B. 2.00 mol C. 6.00 mol D. 4.00 mol
A:

C. 6.00 mol (NYSED rating guide, June 2015 Regents Chemistry, question 38: choice (3))

VERIFIED AGAINST THE SOURCE

“Given the balanced equation representing a reaction: 4Al(s) + 3O2(g) → 2Al2O3(s) How many moles of Al(s) react completely with 4.50 moles of O2(g) to produce 3.00 moles of Al2O3(s)? (1) 1.50 mol (3) 6.00 mol (2) 2.00 mol (4) 4.00 mol”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 38 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
79What is the percent composition by mass of oxygen in Ca(NO3)2 (gram-formula mass = 164 g/mol)? A. 9.8% B. 29% C. 48% D. 59%
A:

D. 59% (NYSED rating guide, June 2015 Regents Chemistry, question 39: choice (4))

VERIFIED AGAINST THE SOURCE

“What is the percent composition by mass of oxygen in Ca(NO3)2 (gram-formula mass = 164 g/mol)? (1) 9.8% (3) 48% (2) 29% (4) 59%”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 39 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
80Given the balanced equation 6Li + N2 → 2Li3N, which type of chemical reaction is represented by this equation? A. synthesis B. decomposition C. single replacement D. double replacement
A:

A. synthesis (NYSED rating guide, June 2015 Regents Chemistry, question 40: choice (1))

VERIFIED AGAINST THE SOURCE

“Given the balanced equation representing a reaction: 6Li + N2 → 2Li3N Which type of chemical reaction is represented by this equation? (1) synthesis (3) single replacement (2) decomposition (4) double replacement”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 40 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
81Which elements can react to produce a molecular compound? A. calcium and chlorine B. hydrogen and sulfur C. lithium and fluorine D. magnesium and oxygen
A:

B. hydrogen and sulfur (NYSED rating guide, June 2015 Regents Chemistry, question 41: choice (2))

VERIFIED AGAINST THE SOURCE

“Which elements can react to produce a molecular compound? (1) calcium and chlorine (2) hydrogen and sulfur (3) lithium and fluorine (4) magnesium and oxygen”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 41 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
82Compared to a 1.0-mole sample of NaCl(s), a 1.0-mole sample of NaCl(ℓ) has a different A. number of ions B. empirical formula C. gram-formula mass D. electrical conductivity
A:

D. electrical conductivity (NYSED rating guide, June 2015 Regents Chemistry, question 42: choice (4))

VERIFIED AGAINST THE SOURCE

“Compared to a 1.0-mole sample of NaCl(s), a 1.0-mole sample of NaCl(ℓ) has a different (1) number of ions (2) empirical formula (3) gram-formula mass (4) electrical conductivity”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 42 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
83Which property of an unsaturated solution of sodium chloride in water remains the same when more water is added to the solution? A. density of the solution B. boiling point of the solution C. mass of sodium chloride in the solution D. percent by mass of water in the solution
A:

C. mass of sodium chloride in the solution (NYSED rating guide, June 2015 Regents Chemistry, question 43: choice (3))

VERIFIED AGAINST THE SOURCE

“Which property of an unsaturated solution of sodium chloride in water remains the same when more water is added to the solution? (1) density of the solution (2) boiling point of the solution (3) mass of sodium chloride in the solution (4) percent by mass of water in the solution”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 43 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
84Which ion combines with Ba²⁺ to form a compound that is most soluble in water? A. S²⁻ B. OH⁻ C. CO3²⁻ D. SO4²⁻
A:

B. OH⁻ (NYSED rating guide, June 2015 Regents Chemistry, question 44: choice (2))

VERIFIED AGAINST THE SOURCE

“Which ion combines with Ba2+ to form a compound that is most soluble in water? (1) S2− (3) CO3 2− (2) OH− (4) SO4 2−”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 44 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
85When a sample of gas is cooled in a sealed, rigid container, the pressure the gas exerts on the walls of the container will decrease because the gas particles hit the walls of the container A. less often and with less force B. less often and with more force C. more often and with less force D. more often and with more force
A:

A. less often and with less force (NYSED rating guide, June 2015 Regents Chemistry, question 45: choice (1))

VERIFIED AGAINST THE SOURCE

“When a sample of gas is cooled in a sealed, rigid container, the pressure the gas exerts on the walls of the container will decrease because the gas particles hit the walls of the container (1) less often and with less force (2) less often and with more force (3) more often and with less force (4) more often and with more force”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 45 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗
86A rigid cylinder with a movable piston contains 50.0 liters of a gas at 30.0°C with a pressure of 1.00 atmosphere. What is the volume of the gas in the cylinder at STP? A. 5.49 L B. 45.0 L C. 55.5 L D. 455 L
A:

B. 45.0 L (NYSED rating guide, June 2015 Regents Chemistry, question 46: choice (2))

VERIFIED AGAINST THE SOURCE

“A rigid cylinder with a movable piston contains 50.0 liters of a gas at 30.0°C with a pressure of 1.00 atmosphere. What is the volume of the gas in the cylinder at STP? (1) 5.49 L (3) 55.5 L (2) 45.0 L (4) 455 L”

— NYSED Regents Examination in Physical Setting/Chemistry, Tuesday, June 23, 2015, question 46 (nysedregents.org); answer from the June 2015 Scoring Key and Rating Guide ↗

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