# Given a mass of 8*g of oxygen gas, what is the molar quantity?

Sep 9, 2017

Approx. $0.25 \cdot m o l$...............with respect to dioxygen gas.....

#### Explanation:

You must simply know that oxygen, as are most of the elemental gases, certainly those that have any chemistry, is a BINUCLEAR gas, i.e. ${O}_{2}$....

And so we take $\text{mass"/"molar mass}$ to get an answer in moles....

$\frac{8 \cdot g}{32.0 \cdot g \cdot m o {l}^{-} 1} = \frac{1}{4} \cdot m o l$

How many oxygen atoms in this mass?