20. Ammonium nitrate, NH4NO3, is a component in nitrogen fertilizers. Determine the mole fraction of NH4NO3 and H2O in a solution that is 2.48 m in NH4NO3. 21. Lactose (C12H22O11) is the natural sugar found in milk. A 0.335M aqueous lactose solution has a density of 1.0432 g/mL at 20C. Calculate the molality of the solution. (mm C12H22O11 = 342.3 g/mol)