# How many grams of aluminum are in 25.0 g of aluminum oxide?

##### 1 Answer
Feb 10, 2017

$\text{%aluminium by mass}$ $=$ "Molar mass of aluminum"/"Molar mass of alumina"xx100%.. $\text{Approx 27%.....}$

#### Explanation:

So in a molar quantity of aluminum, there is a percentage metal content of,

(26.98*g*mol^-1)/(101.96*g*mol^-1)xx100%=??

And in this mass of alumina there are approx. $6.6 \cdot g$ of metal.