76. from examkrackers lecture 4. The air we breahte is approximately 21% O2 and 79% N2. If the partial pressure of nitrogen in air is 600 torr, then all of the following are true: B. The mass of nitrogen in a 22.4 sample of air is 22.1 grams at 0 degrees Celsius. The book says its true, and the explanatin is that "Standard Molar Volume is the volume occupied by one mole of any gas at STP" so if that's true then wouldn't there be one mole of N2 (g) or 28 grams instead of 22.1 grams?