A physics lecture room has a volume of 233 m3 .

For a pressure of 1.00 atm
and a temperature of 26.0 ∘C, use the ideal-gas law to estimate the number of air molecules in the room. Assume all the air is N2
.
Express your answer to three significant figures and include the appropriate units.

Calculate the particle density-that is, the number of N2
molecules per cubic centimeter.
Express your answer to three significant figures and include the appropriate units.

Calculate the mass of the air in the room.
Express your answer to three significant figures and include the appropriate units.