________ is isoelectronic with krypton.
A) Se2-
B) Se3-
C) Br
D) Se2+
E) Te2-
Question 2
Which equation correctly represents what happens when N dissolves in water?
A) NO2 (g) + H2O (l) 2H+ (aq) + NO3- (aq)
B) 3NO2 (g) + H2O (l) 2H+ (aq) + 2NO3- (aq) + NO (g)
C) NO2 (g) + H2O (l) H2O2 (aq) + NO (g)
D) 2NO2 (g) + H2O (l) 2H+ (aq) + NO42- (aq) + NO (g)
E) 2NO2 (g) + 2H2O (l) 2HNO2 (aq) + O2 (g) + H2 (g)
Question 3
A buffer solution with a pH of 4.31 is prepared with 1.0 M HC2H3O2 and ________ M NaC2H3O2. The Ka of HC2H3O2 is 1.8 10-5.
A) 0.37
B) 0.74
C) 4.2 10-6
D) 8.8 10-10
E) 0.18
