January 2020 Chemistry Regents Questions 41-50 Question Preview (ID: 59702)

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Which two gas samples contain equal numbers of atoms?

a) helium and neon

b) helium and argon

c) neon and argon

d) neon and krypton

What occurs when Na2SO4(s) is added to this system, increasing the concentration of SO4^2-(aq)?

a) The equilibrium shifts to the left, and the concentration of Ba^2+(aq) decreases.

b) The equilibrium shifts to the left, and the concentration of Ba^2+(aq) increases.

c) The equilibrium shifts to the right, and the concentration of Ba^2+(aq) decreases.

d) The equilibrium shifts to the right, and the concentration of Ba^2+(aq) increases.

What is a chemical name for the compound?

a) 1-butanamine

b) 1-butanol

c) butanamide

d) butanoic acid

Which numbered interval represents the heat of reaction?

a) 1

b) 2

c) 3

d) 4

When comparing voltaic cells to electrolytic cells, oxidation occurs at the

a) anode in both types of cells

b) cathode in both types of cells

c) anode in voltaic cells, only

d) cathode in voltaic cells, only

Based on Table J, which metal is more active than tin, but less active than zinc?

a) Ag

b) Cr

c) Cs

d) Mn

In a titration, 10.0 mL of 0.0750 M HCl(aq) is exactly neutralized by 30.0 mL of KOH(aq) of unknown concentration. What is the concentration of the KOH(aq) solution?

a) 0.0250 M

b) 0.0750 M

c) 0.225 M

d) 0.333 M

Which emission causes the atomic number of a nuclide to decrease by 2 and its mass number to decrease by 4?

a) an alpha particle

b) a beta particle

c) gamma radiation

d) a positron

What is the unidentified element?

a) L

b) M

c) X

d) Z

Which type of reaction is represented by each of these equations?

a) Both equations represent fission.

b) Both equations represent fusion.

c) Equation 1 represents fission and equation 2 represents fusion.

d) Equation 1 represents fusion and equation 2 represents fission.

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