Equal masses of methane and hydrogen are mixed in an empty container at 25° C The fraction of the total pressure exerted by hydrogen is
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Answer:
Correct option is
B
9
8
Let xg each of hydrogen and methane are mixed.
The moles of hydrogen and methane are
2
x
and
16
x
respectively.
The mole fraction of hydrogen is H
2
=
2
x
+
16
x
2
x
=
9
8
.
The partial pressure of hydrogen is the product of its mole fraction and total pressure.
Thus,
Total pressure
Partial pressure ofH
2
=mole fraction of hydrogen=
9
8
.
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