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18.4 g of N(2)O(4) is taken in a 1 L clo...

18.4 g of `N_(2)O_(4)` is taken in a 1 L closed vessel and heated till the equilibrium is reached.
`N_(2)O_(4(g))hArr2NO_(2(g))`
At equilibrium it is found that 50% of `N_(2)O_(4)` is dissociated . What will be the value of equilibrium constant?

A

0.2

B

2

C

0.4

D

0.8

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