Question

CH4 diffuses twice as fast as Y.mol. Wt. Of Y is??

Answer 1

molecular mass of CH4 =16

Rate of diffusion is inversely proportional to the square root of molecular mass,

Rate of diffusion of CH4 be r

Rate of diffusion of Y be r2

Given: r=2r2

(2r÷r)×(2r÷r)=mol mass of Y ÷16

64=mol mass of Y