Recall that the partial pressure of a gas (PGas) in a mixture is given by:
χGas = mole fraction of the gas
Ptotal = total pressure of the gas mixture
The given percentages indicate the contribution of each gas to the total pressure, which means we can use percentages instead of mole fraction.
For N2: The gas mixture is 78.0% N2.
Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules.
What is the mole fraction of nitrogen in air? Assume ideal behavior.
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