# Density of an Ideal Gas

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

Density of an ideal gas (volumetric mass density) is greatly affected by pressure.

## Density of an Ideal Gas formula

 $$\large{ \rho = \frac {M \; p_{atm} }{R \; T_a} }$$

### Where:

$$\large{ \rho }$$   (Greek symbol rho) = density of an ideal gas

$$\large{ T_a }$$ = absolute temperature

$$\large{ p_{atm} }$$ = atmospheric pressure

$$\large{ M }$$ = molar gas

$$\large{ R }$$ = molar gas constant  ($$\; 8.3144621 J mol^{-1} K^{-1} \;$$)