Question

2.8 gram of nitrogen is mixed with 1.6gram of oxygen. Calculate the mole fractions of oxygen and nitrogen.

Answer 1

atomic mass of N is 14g which is equal to 1mole. there for 2.8G= 1\5 mole.
atomic mass of O is 16g which is equal to 1mole.there for 1.6g=1\10mole.
so if we put both in fraction so answer will be 1:2 ;)