Irodov Problem 2.5

Let the pressure and volume of the gas be P and V respectively. The total number of moles of the mixture is simply the sum of the number of moles of the individual gasses. Hence, from the ideal gas law we have,






Let the effective molar mass of the gas be M. Let the molar masses of the individual gases be M1, M2 and M3. The total mass of the gas is then given by,