The `K_(p)` for the reaction `N_(2)O_(4)hArr2NO_(2)` is `640 mm` at `775 K`. Calculate the percentage dissociation of `N_(2)O_(4)` at equilibrium pressure of `160 mm`. At what pressure, the dissociation will be `50%`?

Explanation

To solve the problem, we need to calculate the percentage dissociation of \(N_2O_4\) at an equilibrium pressure of 160 mm and then determine the pressure at which the dissociation will be 50%.

### Step 1: Understand the Reaction and Define Variables
The reaction is:
\[ N_2O_4 \rightleftharpoons 2NO_2 \]
Let:
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