A gas mixture is composed of:
Methane = 80.75 mol%
Ethane = 7.45 mol%
Propane = 3.25 mol%
Butane = 2.31 mol% ,
Pentane = 0.24 mol%
Nitrogen = 3.05 mol%
Carbon dioxide = 2.95 mol%
How to convert each component from mole% to mass%?.