The equilibrium constant `K_(p)` for the following reaction is `4.5` `N_(2)O_(4)(g)hArr2NO_(2)(g)` What would be the average molar mass `("in"g//mol)` of an equilibriumm mixture of `N_(2)O)(4)` and `NO_(2)` formed by the dissociation of pure `N_(2)O_(4)` at a jtotal pressure of `2` atm ?
A
`69`
B
`57.5`
C
`80.5`
D
`85.5`
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The correct Answer is:
B
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