# A bottle of KMnO_4 contains 66.38 g of the compound. How many moles of KMnO_4 does it contain?

Nov 18, 2015

$0.42$ g/mol

#### Explanation:

The number of moles in a compound is given by the formula:
moles$= \frac{m a s s}{m o l . m a s s}$
Molar mass of $K M n {O}_{4} = 158.034$
Given mass of $K M n {O}_{4} = 66.38 g$

moles of $K M n {O}_{4} =$$\frac{66.38}{158.034} = 0.42$ g/mol