If ' α ' is the degree of dissociation, then at equilibrium Cl2​⇌2ClMoles 1−α2α Total =1+αFrom diffusion information⇒⇒⇒​​r(Kr)​r(mix)​​M(mix) ​M(mix) ​α​=1.16=M(mix)84​​=62.4=1+α71​=62.4=0.14​