How many moles of Co2+ are present in 0.200 L of a 0.400 M ...

[dmcintosh]

How many moles of Co2+ are present in 0.200 L of a 0.400 M solution of CoI2?
 
  A) 2.00
  B) 0.500
  C) 0.160
  D) 0.0800
  E) 0.0400

Question 2

The conjugate base of NH3 is ________.
 
  A) NH2-
  B) NH4+
  C) NH2OH
  D) H3O+
  E) OH-

Question 3

The correct ground-state electron configuration for silver is ________.
 
  A) Kr5s24d9
  B) Kr5s14d10
  C) Kr5s24d10
  D) Xe5s24d9
  E) Xe5s14d10

[stanleka1]

Answer to Question 1

D

Answer to Question 2

A

Answer to Question 3

B