Question

15.0 g of an unknown molecular material is dissolved in 450 g of water. The resulting solution freezes at - 0.34 °C. What is the molar mass of the material ? [K_f for water = 1.86 K kg mol^-1]

Answer 1

W_B = 15 g, W_A = 450 g, △T_f = 0.34 K, M_B = ?

= 182.35 g/mol