Question

225 g of an aqueous solution contains 15g of urea. What is the conc. of the solution in terms of molality (m) ( molecular mass of urea is 60 g mol–1)

Answer 1

Answer:

molality =

molar mass of urea × mass of water in kg

mass of urea

molality =

60 g/mol× 0.150 kg

15.20 g

molality = 1.689 mol/kg

Hence, option A is correct.

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