If 80cm cube of methane (CH4)diffuses through a porous membrane in 20 seconds while 50cm cube of gas Q diffuse through the same membrane in 25 seconds.Calculate the molecular mass of gas Q
R1/R2=√M2/M1. 25*80/50=40
M2=(R1/R2)^2 x M1 = (20/40) x 16 = 4.
He.
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