June 2022 Chemistry Regents Questions 41-50 Question Preview (ID: 59695)

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Based on Table G, which solute sample in 100.g of water at 40.°C can produce a solution equilibrium in a closed system?

a) 10. g KClO3

b) 25 g NaCl

c) 45 g KCl

d) 55 g KNO3

Which change favors the forward reaction?

a) increasing the concentration of O2(g)

b) increasing the temperature

c) decreasing the pressure

d) decreasing the concentration of SO2(g)

When ice, H2O(s), melts at 0°C, entropy increases because the

a) average kinetic energy of the particles increases

b) average kinetic energy of the particles decreases

c) particle arrangement is more random

d) particle arrangement is less random

At STP, propanal and propanone have different chemical properties due to their different

a) molecular masses

b) empirical formulas

c) percent compositions

d) functional groups

What is the IUPAC name of the compound?

a) 2,3-dimethyloctane

b) 2,3-dimethylhexane

c) 4,5-dimethyloctane

d) 4,5-dimethylhexane

This compound is classified as an

a) amide

b) amine

c) ester

d) ether

Which substance is an electrolyte?

a) H2

b) HCl

c) C6H14

d) C6H12O6

An indicator is added to an aqueous solution with a pH value of 5.6. Which indicator is paired with its observed color in this solution?

a) Methyl orange is yellow.

b) Phenolphthalein is pink.

c) Bromcresol green is yellow.

d) Thymol blue is blue.

Solution A has a pH value of 2.0 and solution B has a pH value of 4.0. How many times greater is the hydronium ion concentration in solution A than the hydronium ion concentration in solution B?

a) 10

b) 2

c) 100

d) 4

Which net change occurs in both nuclear fission and nuclear fusion reactions?

a) Mass is converted to energy.

b) Energy is converted to mass.

c) Small nuclei form a larger nucleus.

d) A large nucleus forms smaller nuclei.

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