The Ideal Gas Law describes the behavior of a real gas with a density low enough or temperature high enough that it is far from liquefaction. The Ideal Gas Law can be expressed for Ideal Gases as follows:
pV = NkRT
where p is the absolute pressure of a gas,
V is the volume it occupies,
N is the number of molecules in the gas,
T is its absolute temperature,
and kR is the Boltzmann constant.