A gaseous reaction `A_(2)(g) rarr B(g) + (1)/(2) C(g)` shows increase in pressure form `100 mm` to `120 mm` in `5 min`. What is the rate of disappearance of `A_(2)` ?

Explanation

To solve the problem of determining the rate of disappearance of \( A_2 \) in the reaction \( A_2(g) \rightarrow B(g) + \frac{1}{2}C(g) \), we can follow these steps:

### Step 1: Write the Reaction and Initial Conditions
The reaction is:
\[ A_2(g) \rightarrow B(g) + \frac{1}{2}C(g) \]

Initially, we have:
- Pressure of \( A_2 \) = \( P \) (initial pressure)
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