Chemistry
NULL
Medium
Question
Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________?
A
one / seventeen
B
sixteen / seventeen
C
one / three
✓ Official correct answer
D
two / three
Community credibility
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A
one / seventeen
No member explanations yet for this option.
B
sixteen / seventeen
No member explanations yet for this option.
C
one / three
No member explanations yet for this option.
D
two / three
No member explanations yet for this option.
Explanation
For equal masses of methane (M=16) and oxygen (M=32), methane contributes twice as many moles as oxygen; since partial pressure is proportional to mole fraction, oxygen contributes one-third of the total pressure.
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