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Air contains N(2) and O(2) in the ratio ...

Air contains `N_(2)` and `O_(2)` in the ratio of 4:1 by volume. The average conditions of temperature and pressure ?

A

`12.0`

B

`14.4`

C

`15.6`

D

`28.8`

Text Solution

Verified by Experts

The correct Answer is:
B
As under similar conditions of temperature and pressure, equal volumes contain equal number of moles , therefore, molar ratio of `N_(2)=4//5=0.8` and mol fraction of `O_(2)=0.2`
`:.` Average vapour density of air `=(28.8)/(2)=14.4`
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