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Pure O(2) diffuses through an aperture i...

Pure `O_(2)` diffuses through an aperture in 224 second, whereas mixture of `O_(2)` and another gas containing 80% `O_(2)` diffuses from the same in 234 second. The molecular mass of gas will be:

A

45.6

B

48.6

C

50

D

46.6

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The correct Answer is:
d
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