Let’s assume dry air behaves like an ideal gas and has a molar mass of 28.8 g/mol. a) What is the approximate density of dry air at sea level when the air temperature is 32°C? Hint: How is the unit of standard atmosphere (symbol atm) defined? b) Briefly show and/or explain why this assumption for the molar mass of dry air is reasonable. c) Briefly show and/or explain how the density of air would change with increasing humidity.

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