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The density of a solution prepared by di...

The density of a solution prepared by dissolving 120 g of urea (mol. Mass=60 u) in 1000 g of water is 1.15 g/mL. The molarity if this solution is

A

`1.78 M`

B

`1.02 M`

C

`2.05 M`

D

`0.50 M`

Text Solution

Verified by Experts

The correct Answer is:
C
Weight of water = 1000 g
weight of solute (urea)=120 g
weight of solution =1000+120=1120g
Volume of solution `=("Mass")/("Density")=(1120)/(1.15)`
`=973.9 mL`
Molarity `=(120)/(60xx973.9)xx1000=2.05 M`
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