Z- is a weak base. An aqueous solution of NaZ is prepared by ...

[OSWALD]

Z- is a weak base. An aqueous solution of NaZ is prepared by dissolving 0.350 mol of NaZ in sufficient water to yield 1.0 L of solution. The pH of the solution was 8.93 at 25.0 C. The Kb of Z- is ________.
 
  A) 1.2  10-5
  B) 6.9  10-9
  C) 2.1  10-10
  D) 9.9  10-2
  E) 2.8  10-12

Question 2

1.00 mole of O2 contains the same number of oxygen atoms as
 
  A) 0.667 mole of O3.
  B) 1.00 mole of CH3CO2H.
  C) 2.00 mole of CH3CH2OH.
  D) all of the above.

[anyusername12131]

Answer to Question 1

C

Answer to Question 2

D