Question

What is the density (in kg/m³) of nitrogen gas at a pressure of 2,0 atmospheres and a temperature of 310 K?

Answer 1

The density is

$$\rho=\frac{p\Mu}{RT}=\frac{2·101325·28·10^{-3}}{8.314·310}=2.2\text{ kg/m}^3.$$