Calculate a) molality b) molarity and c) mole fraction of KI if the density of `20%` (mass / mass) aqueous KI is `1.202" g mL"^(-1)`.

As density and % by mass is given, so find the mass of solute and solvent (as x % solution contains x g solute in (100 - x) g solvent).

Find volume of the solution, by using,,

Volume `=("Mass")/("Density")`

Recall the formulae of molality, molarity and mole fraction, to calculate them.

Molality `=("Mass of solute/ molar mass of solute")/("Mass of solventin kg")`