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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 if this solution is

A

0.50 M

B

1.78 M

C

1.02 M

D

2.05 M

Text Solution

Verified by Experts

The correct Answer is:
d
Mass of solution=(1000+120)=1120 g
Volume of solution
=`((1120g))/(115 g mL^(-1))=973.9 mL`
`"Molarity (M)=((120g)//(60 g mol))/(973.9//(1000K))`
`=2.05 molL^(-1)=2.05 M`.
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Knowledge Check

  • The density of 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 the solution is

    A
    0.50 M
    B
    1.78 M
    C
    1.02 M
    D
    2.05 M

  • Dissolving 120 g of urea (molecular mass = 60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is :

    A
    1.78 M
    B
    2.00 M
    C
    2.05 M
    D
    2.22 M

  • Dissolving 120g of urea (mol.wt.60) in 1000g of water gave a solution of density 1.15 g/mL. The molarity of the solution is

    A
    1.78 M
    B
    2.00 M
    C
    2.05 M
    D
    2.22 M

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