Dimethyl ether decomposes as CH3OCH3(g)⟶CH4(g)+CO(g)+H2(g) When CH3OCH3, decomposes to 20% extent at certain fixed conditions, what is the ratio of diffusion of pure CH3OCH3 with methane?

CH3OCH3(g)→CH4(g)+CO(g)+H2(g)  Initial press.:   1                     0          at euilibrium:  1-x                 x                      1-0.2               0.2   ∵x=20% = 0.2rCH3OCH3rCH4=MCH4MCH3OCH3×PCH3OCH3PCH4=1646×0.80.2=2.36:1