# Absolute humidity

## Homework Statement

Estimate the mass of water vapor that is contained in $1 m^3$ of saturated air at a temperature of plus 20 degrees Celsius

2. The attempt at a solution
I looked up the saturation pressure for water vapor at the given temperature. Can I just use the ideal gas-law for the mass? i.e. is the solution as simple as
$$m_{H_2O} = \frac{P_{sat, H_2O}}{R_{H_2O}T}$$
or do I have to make another approach?