How many moles of Co2+ are present in 0.300 L of a 0.500 M ...

[maegan_martin]

How many moles of Co2+ are present in 0.300 L of a 0.500 M solution of CoI2?
 
  What will be an ideal response?

Question 2

What is the charge on the complex ion in Ca2Fe(CN)6?
 
  A) 3-
  B) 2+
  C) 2-
  D) 1-
  E) 4-

Question 3

A closed-end manometer was attached to a vessel containing argon. The difference in the mercury levels in the two arms of the manometer was 9.60 cm. Atmospheric pressure was 783 mm Hg. The pressure of the argon in the container was ________ mm Hg.
 
  A) 96.0
  B) 661
  C) 773
  D) 793
  E) 882

[nmyers]

Answer to Question 1

0.150

Answer to Question 2

E

Answer to Question 3

A

[maegan_martin]

Wow, this really help

[raenoj]

Gracias!