One mole of ideal gas under standard normal conditions occupies a fixed volume of 22.4 liters.
To find the amount of a gas substance, it is necessary to find the ratio of the volume of this gas under standard normal conditions to the volume of one mole of an ideal gas, which is 22.4 liters.
Find the amount of nitrogen gas by dividing the volume of 67.2 liters by the volume of one mole of gas, which is 22.4 liters:
N N2 = 67.2 / 22.4 = 3 mol;
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