# Molar Mass of Gas

Written by Jerry Ratzlaff on . Posted in Thermodynamics

Molar mass is the mass in atomic mass units, of one mole of a substance.

## formula

$$M = v \:\cdot\: 0.0821 \left( \frac {G}{T} \right) p$$

Where:

$$M$$ = molar mass of gas

$$v$$ = volume

$$G$$ = mass of gas

$$T$$ = temperature

$$p$$ = pressure