AP EAMCET Engineering 2018 Apr 22 Shift 2 Paper

At T(K), the vapour pressure of pure benzene is 0.85 bar. A non-volatile, non-electrolyte substance weighing 0.5 g when added to 39 g of benzene, the vapour pressure of the solution is 0.845 bar. The molar mass ( in g mol‌−1 ) of the substance is