Solutions Part 2

Elements P and Q form two types of non-volatile, non-ionizable compounds PQ and PQ2. When 1 g of PQ is dissolved in 50 g of solvent ' A′,∆Tb was 1.176 K while when 1 g of PQ2 is dissolved in 50 g of solvent ' A′,∆Tb was 0.689 K . ( Kb of ' A′=5Kkgmol−1 ). The molar masses of elements P and Q (in gmol−1 ) respectively, are :