# What mass is a sample of oxygen gas that contains Avogadro's number of atoms?

$\text{A 16 g mass...}$
Most of the elemental gases, certainly the gases with any chemistry are BINUCLEAR... We speak of $\text{dinitrogen}$, $\text{dioxygen}$, $\text{dihalogen}$...
And so given a $16 \cdot g$ mass of ${O}_{2}$...we gots HALF a mole of ${O}_{2}$ $\text{oxygen molecules}$, and this is EQUIVALENT to $\text{ONE MOLE}$ of $\text{oxygen atoms}$...