After nitrogen and oxygen the most abundant molecule in
Chapter , Problem 55(choose chapter or problem)
After nitrogen and oxygen the most abundant molecule in Earths atmosphere is water, However, the fraction of molecules in a given volume of air varies dramatically, from practically zero percent under the driest conditions to a high of 4 percent where it is very humid. (a) At a given temperature and pressure, would air be denser when its water vapor content is large or small? (b) What is the difference in mass, at room temperature and atmospheric pressure, between a cubic meter of air with no water vapor molecules and a cubic meter of air in which 4 percent of the molecules are water vapor molecules?
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