A solution containing \(0.50 \mathrm{~g}\) of a sample \(X\) in \(50 \mathrm{~g}\) of a solvent yields a boiling point elevation of \(0.40 \mathrm{~K}\), while a solution of \(0.60 \mathrm{~g}\) of sample \(Y\) in the same mass of solvent gives a boiling point elevation of \(0.60 \mathrm{~K}\). Find out the molar mass of sample \(Y\). The molar mass of \(X\) is \(128 \mathrm{~g} / \mathrm{mol}\).