When 0.5 mole of H, and 0.5 mole of `I_2` react in a 10-litre evacuated vessel at `450^@C`, HI is formed. `K_c` for `H_2 + I_2 iff 2HI` is 50.
(i) Calculate `K_p`
(ii) Calculate moles of `I_2` which are in excess.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Write the balanced chemical equation
The reaction between hydrogen and iodine can be represented as:
\[ \text{H}_2 + \text{I}_2 \rightleftharpoons 2 \text{HI} \]

### Step 2: Set up the initial conditions
Initially, we have:
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