# Question #53f42

May 27, 2017

Atoms of Hydrogen =$2.69 x {10}^{19}$ atoms
Molecules of Hydrogen $\left({H}_{2}\right)$ = $1.34 x {10}^{19}$ molecules
Given $1 c {m}^{3}$ of Hydrogen atoms (or any other gas), the number of hydrogen atoms = $\left({\text{1cm}}^{3} / \left(22 , 400 c {m}^{3}\right)\right) \left(6.02 x {10}^{23}\right)$ atoms of Hydrogen = $2.69 x {10}^{19}$ atoms of Hydrogen.
For 'molecules' of hydrogen $\left({H}_{2}\right)$, divide the above value by 2 => $\frac{2.69 x {10}^{19}}{2}$ = $1.34 x {10}^{19} {H}_{2}$ molecules.