Calculate the molality of the solution containing nonvolatile solute if boiling point elevation of solution is 0.39 K . [ K _ b of water =0.52 ~K ~kg ~mol ⁻¹ ]

Step-by-step solution

Molality from Boiling Point Elevation The boiling point elevation formula expresses the relationship T_b = K_b m , where T_b = 0.39 K and K_b = 0.52 K kg mol ⁻¹ for water. Solving for molality m yields m = T_b K_b = 0.39 0.52 = 0.75 mol kg ⁻¹ . Among the choices, 0.75 mol kg ⁻¹ corresponds to option C .