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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 S.T.P. is:

A

0.555m

B

`5.55xx10^(-4)m`

C

`33.3m`

D

`3.33xx10^(-2)m`

Text Solution

Verified by Experts

`rho_("water")=1kg//dm^(3)=0.3dm^(3)=0.3kg`
Also `n_("urea")=(0.01/60)`
`:.` Molality `=0.01/60xx1/((0.3))=5.55xx10^(-4)` molal
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