////Variable Declaration m = 0.5 //Mass of water, kg ms = 24.0 //Mass of solute, g Ms = 241.0 //Molecular wt of solute, g/mol Tfd = 0.359 //Freezinf point depression, °C or K kf = 1.86 //Constants for freezing point depression for water, K kg/mol //Calculations msolute = ms/(Ms*m) gama = Tfd/(kf*msolute) //Results printf("\n Activity coefficient = %4.3f",gama)