# How do you find density in the ideal gas law?

##### 1 Answer

Dec 19, 2013

The density is determined by utilizing a variation of the ideal gas law where density and molar mass replace moles and volume.

The original ideal gas law uses the formula PV = nRT, the density version of the ideal gas law is PM = dRT, where P is pressure measured in atmospheres (atm), T is temperature measured in kelvin (K), R is the ideal gas law constant 0.0821

By rearranging the formula to