# What is the volume occupied by 10.8 g of argon gas at a pressure of 1.30 atm and a temperature of 408 K?

##### 1 Answer

The volume of argon will be 6.96 L.

#### Explanation:

Use the ideal gas law

Since we have mass and need moles, we must divide the given mass of argon by its molar mass (atomic weight on the periodic table in g/mol). The molar mass of argon is 39.948 g/mol.

I am keeping a couple of guard digits to reduce rounding errors. I will round the final answer to three significant figures.

**Ideal Gas Law**

**Given/Known**

https://en.wikipedia.org/wiki/Gas_constant

**Unknown**

**Equation**

**Solution**

Rearrange the equation to isolate volume,