Dry air is essentially a mixture of the following

Chapter 3, Problem 96

(choose chapter or problem)

Dry air is essentially a mixture of the following entities: , , Ar, and . The composition of dry air, in mole percent, is 78.08% , 20.95% , 0.93% Ar, and 0.04% CO2. (a) What is the mass, in grams, of a sample of air that contains exactly one mole of the entities? (b) Dry air also contains other entities in much smaller amounts. For example, the mole percent of krypton (Kr) is about . Given that the density of dry air is about at room temperature, what mass of krypton could be obtained from exactly one cubic meter of dry air?

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