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

Nov 3, 2015

0.08 moles.

#### Explanation:

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

Or:

$c = \frac{n}{v}$

$\therefore n = c \times v$

$n = 0.4 \times 0.2 = 0.08$