The percentage change in the pressure of a given mass of a gas filled in a container at constant temperature is 100%. Calculate the percentage change in its volume.

Explanation

To solve the problem, we will use the relationship between pressure and volume of a gas at constant temperature, which is described by Boyle's Law. According to Boyle's Law, for a given mass of gas at constant temperature, the product of pressure and volume is constant:

\[ P_1 V_1 = P_2 V_2 \]

### Step-by-Step Solution:

1. **Understanding the Given Information:**
- We are told that the percentage change in pressure is 100%. This means that the final pressure \( P_2 \) is double the initial pressure \( P_1 \).
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