A 100mL mixture containing 72% of CH_(4) by volume and the rest an unknown gas 'X' was kept in a vessel Due to a very fin e crack the mixture effused out 21mL of the mixture was lost and the remaining mixture contained 68.35% of methane by volume Calculate molecular mass of gas X All the measurement are made at same temperature and pressure .

A 100mL mixture containing 72% of CH_(4) by volume and the rest an unk

1.	A 100mL mixture containing 72% of CH_(4) by volume and the rest an unknown gas 'X' was kept in a vessel Due to a very fin e crack the mixture effused out 21mL of the mixture was lost and the remaining mixture contained 68.35% of methane by volume Calculate molecular mass of gas X All the measurement are made at same temperature and pressure .
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