An aqueous solution of ethanol has density 7.025 g/mL, and, it is 2 M. What is the molality of this solution ?

1000 mL solution contain 2 mole of ethanol or 1000 x 1.025 g solution contain 2 mole of ethanol wt. of solvent =1000 x1.025 -2 x 46 =1025 -92 =933m=21000×1.025−2×46×1000m=2933×1000=2.143