What is the mole fraction of a solute if the vapor pressure of a solution is 23 mm Hg and that of pure solvent is 25 mm
(p⁰ - p/p⁰) = xsolute . (25 - 23/25) = (2/25) = 0.08 .
Ref: NCERT Class 12 Chemistry > Chapter 1: Solutions > Topic: Types of Solutions and Expressing Concentration