Question

rwo molar solution of urea and water is prepared and the density of the solution is 1.2 grams per cc then find out the molality of the solution​

Answer 1

2 Molar solution means 2 moles Urea in 1L solution.

So, Mass of Urea in solution is 2×60 = 120g

Mass of 1.2g/cc solution is 1.2×1000 = 1200g

So, mass of solvent is 1200-120 = 1080g

So, molality = (2/1080) × 1000 = 1.85 (m)