A vessel contains methane and oxygen in the mass ratio 2:1. The fraction of the partial pressure of oxygen in the total pressure is

A vessel contains methane and oxygen in the mass ratio 2:1. The fracti

1.	A vessel contains methane and oxygen in the mass ratio 2:1. The fraction of the partial pressure of oxygen in the total pressure is
Answer» `1//3` `2//3` `1//4` `1//2` ANSWER :B