# A sample of hydrogen gas occupies 14.1 L at STP. How many moles of the gas are present?

$0.63 m o l$

#### Explanation:

For gases at STP, the molar volume equation/relationship can be used where 1 mol of gas occupies 22.4 L of volume.

Therefore,
$14.1 \cancel{L} \setminus \cdot \frac{1 m o l}{22.4 \cancel{L}} = 0.6294642857143 m o l$