# Question: A sample of dry air that has a mass of 100 00 g

A sample of dry air that has a mass of 100.00 g, collected at sea level, is analyzed and found to consist of the following gases:
Nitrogen (N2) = 75.52 g
Oxygen (O2) = 23.15 g
Argon (Ar) = 1.28 g
Carbon dioxide (CO2) # 0.05 g
Plus trace amounts of neon, helium, methane, and other gases.
(a) Calculate the partial pressure of each gas when the pressure is 1.013 X 105 Pa.
(b) Determine the volume occupied by the 100-g sample at a temperature of 15.00°C and a pressure of 1.00 atm. What is the density of the air for these conditions?
(c) What is the effective molar mass of the air sample?

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