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An aqueous solution of urea containing 1...

An aqueous solution of urea containing 18 g urea in 1500 `cm^(3)` of solution has a density of 1.5 `g//cm^(3)` . If the molecular weight of urea is 60. Then the molality of solution is:

A

`0.200`

B

`0.192`

C

`0.100`

D

`1.200`

Text Solution

Verified by Experts

The correct Answer is:
B
`M=V xx D=1500 xx 1.052g =1578g.`
Solvent =1560 g, solute = 18g
`"Molality"=("mass" xx 1000)/"Molar mass" xx "Mass of solvent is g"`
`18 xx 1000/(60 xx (1578-18))=(19 xx 1000)/(60 xx 1560)=0.192`
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