What is the mole fraction of oxygen in a gas mixture that is 37% oxygen and 63% nitrogen by volume?
A) 0.20
B) 0.37
C) 0.32
D) 0.52

Question

Quizplus · Accepted Answer

The mole fraction of a component in a mixture is the ratio of the number of moles of that component to the total number of moles of all components in the mixture. For gases, if the mixture is ideal, the mole fraction is also the volume fraction. Therefore, if the gas mixture is 37% oxygen by volume, the mole fraction of oxygen is also 0.37.

What Is the Mole Fraction of Oxygen in a Gas