Given number of moles of Cu(NO3)2 = 1.0
mol
Mass of water = 1000 g = 1 kg   Since 1 kg =
1000 g
We know that molality , m = number of moles of solute / Mass of
solvent in Kg
                                     Â
= number of moles of Cu(NO3)2 / Mass of water
in kg
                                     Â
= 1.0 mol / 1 kg
                                     Â
= 1 m
Therefore the molailty of the solution is 1 m
