What is the freezing point of water?

What is the freezing point of a solution that contains 20.3 g of urea,CO(NH2)2 in 265 mL water?

• What is the freezing point of a solution that contains 20.3 g of urea, CO(NH2)2 in 265 mL water, H2O ? Assume a density of water of 1.00 g/mol? please help thanks

• Answer:

  Molar mass of CO(NH2)2 is 60.05 g / mole moles of urea = 20.3 / 60.05 = 0.3381 moles mass of water = 265 g so molality = 0.3381 mol / .265L = 1.2757 m delta t = m x Kf x i there is 1 particle in solution so i =1 Kf for water = 1.86 delta t = 1.2757 x 1.86 = 2.37 degree c freezing point = - 2.37 degree C