Question

find mole fraction if molality of aq. solution is 0.2​

Answer 1

Explanation:

The mole fraction of solute = 0.2 then the mole fraction of solvent = 1- 0.2 = 0.8. Molality = moles of solute/kg solvent; Molar Mass H2O=40 g/kg = (0.8 x40)/1000 = 0.032 Molality = 0.2/0.032 = 6.25