Question

What is the composition of the O2 gas on an SO2-free basis?

(a) 0.78 and 0.22

(b) 0.22 and 0.78

(c) 0.70 and 0.25

(d) 0.25 and 0.78

This question was addressed to me in homework.

My question comes from Choosing a Basis topic in chapter Introductory Concepts of Chemical Process Calculation

Answer 1

The correct option is (a) 0.78 and 0.22

To elaborate: First take a basis of 100 mole and then we get the moles of each gas. Next step is to eliminate 5 moles of SO2 and then calculate the composition of the gas.