# How many moles of CH_4 contain 1.5 * 10^23 particles?

Dec 31, 2015

$\text{0.25 mol CH"_4}$

#### Explanation:

The particles of ${\text{CH}}_{4}$ are molecules.

$1 \text{mol CH"_4=6.022xx10^23"molecules CH"_4}$

To determine the moles of $\text{CH"_4}$, divide the given number of molecules by $6.022 \times {10}^{23}$ molecules/mol.

$1.5 \times {10}^{23} \cancel{\text{molecules CH"_4xx(1"mol CH"_4)/(6.022xx10^23cancel"molecules CH"_4)="0.25 mol CH"_4}}$ (rounded to two significant figures)