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What is the molality of solution contain...

What is the molality of solution containing 200 mg of urea `("molar mass"60" g mol"^(-1))` dissolved in 40 g of water ?

A

`0.0833`

B

`0.825`

C

`0.498`

D

`0.0013`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) Molality (m)
`=("Mass of solvent(in g)"xx1000)/("Molecular weight of solute "xx" mass of solvent (in g)")`
`=(200xx10^(-3)xx1000)/(60xx40)=0.0833`
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