Molarity of a solution of density 0.9 g/ml is 1 M. Molality of the same solution under similar conditions will be (Molar mass of solute - 150 g)

Molarity of the solution = 1MNumber of moles of solute = 1Volume of the solution = 1000 mlDensity of the solution = 0.9 g/mlWeight of the solution = V x d = 900 gWeight of solute = Wsolution-Wsolute                          = (900 - 150) g                         = 750 gmolality (m) = nsolute×1000Wsolvent                   =1×1000750=1.33 m