Question

A mixture contains 10 grams each of CH4, H2O, and SO2, what is the mole fraction of CH4?

(a) 0.14

(b) 0.31

(c) 0.46

(d) 0.67

The question was asked by my school principal while I was bunking the class.

Question is from Mole Fraction and Mass(Weight) Fraction topic in portion Moles, Density & Concentration of Basic Chemical Engineering

Answer 1

The correct choice is (c) 0.46

To elaborate: Mole fraction of CH4 = (10/16)/[(10/16) + (10/18) + (10/64)] = 0.46.