At `27^(@)C` and 1 atm pressure ,`N_(2)O_(4)` is 20% dissociation into `NO_(@)` .What is the density of equilibrium mixture of `N_(2)O_(4) and NO_(2)` at `27^(@)C` and 1 atm?
A
`3.11 g//litre`
B
`2.11 g//litre`
C
`4.5 g//litre`
D
none of these
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a
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