Solutions Part 2

When 1 g each of compounds AB and AB2 are dissolved in 15 g of water separately, they increased the boiling point of water by 2.7 K and 1.5 K respectively. The atomic mass of A (in amu) is ____ ×10−1 (Nearest integer)
(Given: Molal boiling point elevation constant is 0.5 K‌kg‌mol−1)