Question

1. The energy released when a mole of neutrons (1.00866 AMU) changes into a mole of protons (1.00728 AMU) is

a. 9.0655 x 10¹³ kJ

b. 9.0655 x 10¹⁶ kJ

c. 1.240 x 10¹⁴ kJ

d. 1.240 x 10¹¹ kJ

2. A student is trying to electroplate a plastic spoon with silver. The student has an external power source and a silver electrode as well as aqueous silver solution. When put together in the correct sequence, what will be the result?

a. it depends on the voltage used and for how long it is connected

b. it will instantly be silver plated

c. nothing will happen

d. the spoon will melt and catch on fire

3. The reaction in an electrolytic cell at the cathode in a saturated sodium sulfate solution would be

a. Na⁺ (aq) + e^- -> Na (s)

b. SO₄^2- (aq) -> S (s) + 2O₂ (g) + 2e^-

c. 2H⁺ (aq) + 2e^- -> H₂ (g)

d. 4OH^- (aq) -> O₂ (g) + 2H₂O (l) + 4e^-

Answer 1

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