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The density of a solution prepared by di...

The density of a solution prepared by dissolving 120 g of urea ( mol. `"mass"= 60 u` ) in 1000 g of water is 1.15 g/mL. The molarity of this solution is :

A

2.05 M

B

0.50 M

C

1.78 M

D

1.02 M

Text Solution

Verified by Experts

The correct Answer is:
A
Mass of solution `=1000+120=1120g`
Volume of solution `=(1120)/(1.15)`
Moles of urea `=(120)/(60)=2`
Molarity `=("Moles of urea")/("Volume")xx1000`
`=(2)/(1120//1.15)xx1000`
`=2.05M`
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