August 2018 Chemistry Regents Questions 41-50 Question Preview (ID: 59744)

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What is the amount of heat, in joules, required to increase the temperature of a 49.5-gram sample of water from 22°C to 66°C?

a) 2.2 × 10^3 J

b) 4.6 × 10^3 J

c) 9.1 × 10^3 J

d) 1.4 × 10^3 J

A sample of a gas in a rigid cylinder with a movable piston has a volume of 11.2 liters at STP. What is the volume of this gas at 202.6 kPa and 300. K?

a) 5.10 L

b) 6.15 L

c) 22.4 L

d) 24.6 L

Which diagram represents the most likely orientation of X2 and Z2 when the molecules collide with proper energy, producing an activated complex?

a) 1

b) 2

c) 3

d) 4

What is the chemical name for the compound CH3CH2CH2CH3?

a) butane

b) butene

c) decane

d) decene

In a laboratory activity, the density of a sample of vanadium is determined to be 6.9 g/cm3 at room temperature. What is the percent error for the determined value?

a) 0.15%

b) 0.87%

c) 13%

d) 15%

Which half-reaction equation represents the oxidation in the reaction?

a) Ni^4+ + 2e- → Ni^2-

b) Ni^4+ → Nii^2- + 2e-

c) Cd → Cd^2+ + 2e-

d) Cd + 2e- → Cd^2+

Which metal reacts spontaneously with NiCl2(aq)?

a) Au(s)

b) Cu(s)

c) Sn(s)

d) Zn(s)

Which solution is the best conductor of an electric current?

a) 0.001 mole of NaCl dissolved in 1000. mL of water

b) 0.005 mole of NaCl dissolved in 1000. mL of water

c) 0.1 mole of NaCl dissolved in 1000. mL of water

d) 0.05 mole of NaCl dissolved in 1000. mL of water

Compared to a 1.0-liter aqueous solution with a pH of 7.0, a 1.0-liter aqueous solution with a pH of 5.0 contains

a) 10 times more hydronium ions

b) 100 times more hydronium ions

c) 10 times more hydroxide ions

d) 100 times more hydroxide ions

Which type of reaction is represented by this equation?

a) neutralization

b) polymerization

c) substitution

d) transmutation

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