The molality of a urea solution in which...

The molality of a urea solution in which ` 0.0100 g ` of urea, ` [(NH_(2))_(2)CO] ` is added to ` 0.3000 dm^(3) `of water at STP is

A

`0.555m`

B

`5.55 xx 10^(-4)m`

C

`33.3 m`

D

`3.33 xx 10^(-2)m`

Verified by Experts

The correct Answer is:

B

`m = (n)/(WCkg) = (0.01//60)/(0.3kg) = 5.55 xx 10^(-4) mol//kg`

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