`A_(2)B` is an ideal gas, which decomposes according to the equation `A_(2)B to A_(2) + 1/2B_(2)`. At start, the initial pressure is 100 mm of Hg and after 5 minutes, the pressure is 120 mm of Hg. What is the average rate of decomposition of `A_(2)B`? Assume T and V are constant.

Explanation

To find the average rate of decomposition of the gas \( A_2B \), we can follow these steps:

### Step 1: Write the balanced chemical equation
The decomposition of the gas \( A_2B \) can be represented as:
\[ A_2B \rightarrow A_2 + \frac{1}{2}B_2 \]

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