# What is the pressure in atmospheres of 0.246 gram of hydrogen gas occupying a volume of 0.0500 liters at 21.0°C?

##### 1 Answer

The pressure of

#### Explanation:

You need the ideal gas law to answer this question.

First convert the mass of hydrogen gas

Molar mass

Moles

Now you need to determine your known and unknown variables.

**Known**

**Unknown**

**Solution**

Rearrange the ideal gas equation to isolate

rounded to three significant figures