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The vapour density of a mixture containi...

The vapour density of a mixture containing `NO_(2)` and `N_(2)O_(4)` is `38.3 at 27^(@)C`. Calculate the mole of `NO_(2)` in `100 g` mixture.

A

`0.043`

B

`4.4`

C

`3.4`

D

`0. 437`

Text Solution

Verified by Experts

The correct Answer is:
D
No. of molecules `=2xxv.d`
`2xx38.3= 76.6`
Weight of `NO_(2)`
So that weight of `N_(1)O_(4)= 100-x`
Hence, `(x)/(46)+(100-x)/(92)=(100)/(76.6)`
`=(2x+100-x)/(92)= (100)/(76.6)`
`x= 20.10`, the number of moles of `NO_(2)`
`=(20.10)/(46)= 0.437`
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