Question

Potassium permanganate (KMnO4) is used as an explosive agent. How many moles are there if we have 105.66 grams of potassium permanganate?

Answer 1

0.669mole

Explanations:

The formula for calculating the number of moles is expressed as:

`moles=\frac{Mass}{Molar\text{ mass}}`

Given the following parameters

`\begin{gathered} Mass\text{ of }KMnO_4=105.66grams \\ molar\text{ mass of }KMnO_4=158.034g\text{/mol} \end{gathered}`

Substitute the given parameters into the formula

`\begin{gathered} mole\text{ of KMnO}_4=\frac{105.66g}{158.034g\text{/mol}} \\ mole\text{ of KMnO}_4=0.669mole \end{gathered}`

Hence the molar mass of KMnO4 that were there is 0.669mole