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Tardigrade
Question
Chemistry
Equal masses of methane and oxygen are mixed in an empty container at 25° C. The fraction of the total pressure exerted by oxygen is
Q. Equal masses of methane and oxygen are mixed in an empty container at
2
5
∘
C
. The fraction of the total pressure exerted by oxygen is
297
169
Solutions
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A
1/2
36%
B
2/3
30%
C
3
1
×
298
273
16%
D
1/3
19%
Solution:
Let the mass of methane and oxygen
=
m
g
.
Mole fraction of
O
2
=
Moles of
O
2
+
M
o
l
e
s
of
C
H
4
Moles of
O
2
=
m
/32
+
m
/16
m
/32
=
3
m
/32
m
/32
=
3
1
Partial pressure of
O
2
=
Total pressure
×
mole fraction of
O
2
,
P
O
2
=
P
×
3
1
=
3
1
P