Solutions - Medium

A solution containing

0.1\,\text{g}

of a non-volatile organic substance P (molecular mass

100

) in

100\,\text{g}

of benzene raises the boiling point of benzene by

0.4^\circ\text{C}

, while a solution containing

0.1\,\text{g}

of another non-volatile substance Q in the same amount of benzene raises the boiling point by

0.2^\circ\text{C}

. What is the ratio of molecular masses of P and Q?