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CGP EDU Academic Team
Published on: August 13, 2026
A compound H 2 X with molar weight of 80 g is dissolved in a solvent having density of 0.4 g ml –1 . Assuming no change in volume upon dissolution, the molality of a 3.2 molar solution is
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(8)
Given 3.2 M solution
∴ moles of solute = 3.2 mol
Consider 1 L Solution.
∴ volume of solvent = 1 L
P solvent = 0.4 g.mL –1 ∴ m solvent = P × V = 400 g
∴ molality = 
= 8 molal
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