Question

The vapour pressure of pure benzene at certain temperature is 640 mm Hg.2h of a nine volatile solid is added to 39 g if benzene.The vapour pressure of the solution is 600mm.The molecular weight of the substance is ​

Answer 1

I had make the value of Xb in left

solve it and u will get equation

1=52/13M+15/16

solve it and get value of M