Chemistry - Liquid Solution Question with Solution | TestHub

Two elements x and y form two types of non-electrolyte molecules like ${\mathrm{xy}}_3$ and xy .

1 gm of ${\mathrm{xy}}_3$ lowers the freezing point by $1^{\circ }\mathrm{C}$ when dissolved in 100 gram solvent whereas for the same lowering in freezing point for same amount of solvent 0.5 gram xy is required. The sum of the atomic masses of x and y is Z . Find $\left(\frac{\mathrm{Z}}{5}\right)$. (Given : ${\mathrm{k}}_{\mathrm{f}}$ for solvent is $5\mathrm{K}{\mathrm{molal}}^{-1}$ ).