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MHT CET 2017 Chemistry Solved Paper
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© examsnet.com
Question : 3
Total: 50
The molality of solution containing 15.20 g of urea, (molar mass = 60) dissolved in 150 g or water is
1.689 mol
k
g
−
1
0.1689 mol
k
g
−
1
0.5922 mol
k
g
−
1
0.2533 mol
k
g
−
1
Validate
Solution:
(a) Molality
(m) =
Number
of
moles
of
solute
Mass
of
solvent
(
in
k
g
)
⇒
15.2
60
0.150
=
0.2533
0.15
⇒
1.689
m
o
l
k
g
−
1
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