1. The problem statement, all variables and given/known data: The density of a 2.05 molar solution of acetic acid is 1.02g/ml. The Molality of the solution is: (a) 1.14 mole/kg (b) 3.28 mole/kg (c) 2.28 mole/g (d) 0.44 mole/kg 2. Relevant equations: 3. The attempt at a solution: I tried it out very simply using unitary method: Molality is the number of moles of solute in 1000g of solvent. 1.02g acetic acid has 1ml volume. So, 1000g acetic acid has 1000/1.02 ml volume. 1000ml acetic acid soln. has 2.05 moles of the acid. So, 1000/1.02 ml has 2.05/1.02 moles = 2moles. This answer doesn't match with any answer. Where am I wrong?