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Equal moles of water and user are taken ...

Equal moles of water and user are taken in a flask. What is mass percentage of urea in the solution ?

A

0.07692

B

0.092

C

0.7692

D

0.007692

Text Solution

Verified by Experts

The correct Answer is:
C
If `H_2O` = x mole
Mass of x mole of `H_2O` = 18 xg
Then urea = x mole
Mass of x mole of `NH_2 - overset(O)overset(||)C-NH_2` = 60 x g
Total mass of the solution `= 18 x + 60 x = 78 x g `
Mass % of urea `=(60x)/(78x) xx100 = 76.92%`
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