Solutions Part 2

' W ' g of a non-volatile electrolyte solid solute of molar mass ' M ' gmol−1 when dissolved in 100 mL water, decreases vapour pressure of water from 640 mm Hg to 600 mm Hg . If aqueous solution of the electrolyte boils at 375 K and Kb for water is 0.52Kkgmol−1, then the mole fraction of the electrolyte solute (x2) in the solution can be expressed as
(Given : density of water =1g∕mL and boiling point of water =373K )