Задача 20282.

Dry air consists mainly of oxygen and nitrogen. If we neglect the other components of air, then we can assume that the mass fractions of oxygen and nitrogen are 0.232 and 0.768, respectively. Determine the molar mass M of air.

A detailed solution with a brief note of the conditions, formulas and laws used in the solution, the derivation of the calculation formula and the answer.
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