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Q.

The molality of urea solution in which 0.0100g of urea NH22CO is added to 0.3000 dm3   of water at 4C  ∘ is ___?

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a

5.55×10-4m

b

33.3 m

c

3.33×10-2 m

d

0.555 m

answer is A.

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Detailed Solution

Molality=moles of solute /mass of solvent in kg                =0.01/600.3=0.0160×0.3 =5.55×10-4m
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