Equal masses of Helium, methane and sulphur dioxide are taken in a closed container at 300 K . Partial pressure ratio of He:CH4:SO2  is

WHe: WCH4: WSO2 = 1:1:1nHe :  nCH4:  nSO2 = 14 :  116 : 164nHe :  nCH4:  nSO2 = 16:4:1; pressure∝moles at constant V and T; So mole ratio is pressure ratio;