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Question

Dissolving 120 g of urea (molar mass 60 g mol1) in 1000 g of water gave a solution of density 1.15 g/ml. The molarity of the solution is :

A
1.78 M
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B
2.00 M
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C
2.30 M
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D
2.22 M
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Solution

The correct option is C 2.30 M
Mass of solute =120 g
Mass of water =1000 g
Mass of solution =1120 g
Volume of solution (md)=10001.15 ml=11.15 L
M=1206011.15=2.30 M

Hence, option C is correct.

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