The missing product in the nuclear reaction represented above is
Which of the following is (are) true regarding the aqueous dissociation of
HCN, Ka = 4.9 × 10−10, at 25°C?
I. At equilibrium, [H+] = [CN−].
II. At equilibrium, [H+] > [CN−].
III. HCN (aq) is a strong acid.
(A) I only
(B) II only
(C) I and II only
(D) I and III only
(E) I, II, and III
- This question pertains to the reaction represented by the following equation:
2NO(g) + O 2 (g) 2NO 2 (g) +150 kJ
Suppose that 0.8 mole of NO is converted to NO 2 in the above reaction.
What amount of heat will be evolved?
(A) 30 kJ
(B) 60 kJ
(C) 80 kJ
(D) 130 kJ
(E) 150 kJ
- How does a Brønsted-Lowry acid differ from its conjugate base?
(A) The acid has one more proton.
(B) The acid has one less proton.
(C) The acid has one more electron.
(D) The acid has one less electron.
(E) The acid has more than one additional proton.
- Two containers having 1 mole of hydrogen gas and 1 mole of oxygen gas,
respectively, are opened. What will be the ratio of the rate of effusion of the
hydrogen to that of the oxygen?