June 2024 Chemistry Regents Questions 21-30 Question Preview (ID: 63421)

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Chemical reactions are most likely to occur when reacting particles collide with the

a) proper energy and proper orientation

b) proper first ionization energy and proper molecular symmetry

c) same mass and the same number of electrons

d) same number of valence electrons and the same number of electron shells

At STP, a 2.0-liter sample of nitrogen gas and a 2.0-liter sample of oxygen gas have equal

a) atomic masses

b) numbers of molecules

c) densities

d) boiling points

Which compound has the weakest intermolecular forces at 75°C?

a) ethanoic acid

b) ethanol

c) propanone

d) water

Which term identifies a force of attraction that exists between molecules of water?

a) covalent bonding

b) hydrogen bonding

c) ionic bonding

d) metallic bonding

Which process results in an increase in disorder?

a) the condensation of water vapor

b) the freezing of liquid ethanol

c) the sublimation of solid iodine

d) the solidification of melted sodium chloride

Systems in nature tend to undergo changes that result in

a) an increase in both energy and entropy

b) a decrease in both energy and entropy

c) an increase in energy and a decrease in entropy

d) a decrease in energy and an increase in entropy

What is the general formula for the homologous series that includes ethyne?

a) 1

b) 2

c) 3

d) 4

When 2.0 moles of electrons are gained by fluorine, how many moles of electrons are lost by iodine?

a) 1.0 mol

b) 2.0 mol

c) 3.0 mol

d) 4.0 mol

Which compound is an Arrhenius base?

a) H2SO4

b) NaCl

c) Ca(OH)2

d) KNO3

Which statement describes a benefit of fission?

a) Fission produces nuclear power.

b) Fission increases the possibility of nuclear accidents.

c) Fission increases the possibility of biological exposure.

d) Fission produces waste products that need long-term storage.

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