Arrange the following gases in order of decreasing diffusion:?

Question

Cl2,H2,CO2,CH4,CO,SO2,Ar,F2

Answer 1

Well, I believe I wouldn't be wrong to use Graham's law of effusion:

1/√molar mass of compound:

1/√71 = 0.12 for Cl2    slowest

1√2 = 0.71 for H2        fastest

1√44 = 0.15 for CO2

1√16 = 0.25 for CH4

1√28 = 0.19 for CO

1/√64 = 0.13 for SO2

1/√40 = 0.16 for Ar

1√19 = 0.23 for F2

The order would be:

H2 > CH4 > F2 > CO > Ar > CO2 > SO2 > Cl2