Question

How many moles of `Co^(2+)` are present in 0.200 L of a 0.400 M solution of `CoI_2`?

Answer 1

0.08 moles.

Explanation:

Concentration = number of moles of solute / volume of solution.

Or:

`c=n/v`

`:.n= cxxv`

`n= 0.4 xx0.2= 0.08`