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A mixture of methane and ethane in the m...

A mixture of methane and ethane in the molar ratio of x:y has a mean molar mass of 20. what would be the mean molar mass, if the gases are mixed in the molar ratio of y:x?

A

20 u

B

25 u

C

24 u

D

15 u

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The correct Answer is:
C
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