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Assume that the decomposition of HNO(3) ...

Assume that the decomposition of `HNO_(3)` can be repersented by the following equation
`4HNO_(3)(g)hArr4NO_(2)(g)+2H_(2)O(g)+O_(2)(g)` and the reaction approaches wquilibrium at `400 K` temperature and `30` atm pressure. At equilibrium partial pressure of `HNO_(3)` is `2` atm
Calculate `K_(c)` in `(mol//L-K)` at `400K`
`(Use:R=0.08atm-L//mol-K)`

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