# What is the mass of 1 mole of O_2 molecules?

Jan 18, 2016

$31.9988 g$
To obtain the mass of 1 mole ${O}_{2}$ molecule, you simply have to multiply it to its molecular weight which is $31.9988 \frac{g}{m o l}$.
g ${O}_{2} = 1 m o l {O}_{2} \cdot \left(31.9988 \frac{g}{m o l {O}_{2}}\right)$
g ${O}_{2} = 31.9988$