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Tardigrade
Question
Chemistry
138 g of ethyl alcohol is mixed with 72 g of water. The ratio of mole fraction of alcohol to water is
Q.
138
g
of ethyl alcohol is mixed with
72
g
of water. The ratio of mole fraction of alcohol to water is
2216
231
Manipal
Manipal 2012
Solutions
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A
3
:
4
60%
B
1
:
2
20%
C
1
:
4
20%
D
1
:
1
0%
Solution:
Number of moles of
C
2
H
5
O
H
=
46
138
=
3
Number of moles of
H
2
O
=
18
72
=
4
Mole fraction,
x
C
2
H
5
O
H
=
3
+
4
3
=
7
3
Mole fraction,
x
H
2
O
=
3
+
7
4
=
7
4
x
H
2
O
x
C
2
H
5
O
H
=
4/7
3/7
=
4
3