Chemistry - Liquid Solution Question with Solution | TestHub

The vapour pressure of pure liquid$\mathrm{A}$decreases from$\mathrm{0.80 }\mathrm{a}\mathrm{t}\mathrm{m}$to$\mathrm{0.6 }\mathrm{a}\mathrm{t}\mathrm{m}$on mixing a non-volatile solute$\mathrm{B}$to liquide$\mathrm{A}$. The mole fraction of B in the solution is