(Where Mm is the average molar mass and Ru is the universal gas constant)
The pressure of a gas mixture is equal to the sum of the individual gas pressures if they existed alone at the mixture temperature.
The volume of a gas mixture is equal to the sum of the individual gas volumes if they existed alone at the mixture temperature.
Under ideal approximation, each component gas of a mixture behaves as it exists alone at the mixture temperature.
Mass Fraction:
Mole Fraction:
Molar Mass:
Gas constant of the Mixture:
The partial pressure is equal to the mole fraction of the component multiplied by the pressure of the mixture.
The partial volume is equal to the mole fraction of the component multiplied by the volume of the mixture.