Question

What is the mole fraction of O2?

(a) 0.2

(b) 0.4

(c) 0.6

(d) 0.8

This question was posed to me in an interview for internship.

This is a very interesting question from Mole and Molecular Weight topic in section Introductory Concepts of Chemical Process Calculation

Answer 1

The correct answer is (b) 0.4

Explanation: Mole fraction = Moles of the component / Total moles.