Find the density of a gas mixture in which the mass fractions of nitrogen and oxygen are 79% and 21%, respectively, of hydrogen.

Air is a mixture of several gases, where the two most dominant components in dry air are 21 vol% oxygen and 78 vol% nitrogen. Oxygen has a molar mass of 15.9994 g/mol and nitrogen has a molar mass of 14.0067 g/mol. Since both of these elements are diatomic in air - O2 and N2, the molar mass of oxygen gas is 32 g/mol and the molar mass of nitrogen gas is 28 g/mol.

The average molar mass is equal to the sum of the mole fractions of each gas multiplied by the molar mass of that particular gas:

Mmixture = (x1*M1 + + xn*Mn) (1)

where

xi = mole fractions of each gas

Mi = the molar mass of each gas

The molar mass of dry air is 28.9647 g/mol. Composition and content of each gas in air is given in the figures and the table

Объяснение:

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