A gas occupies 3 litres at `0^@C` What volume will it occupy at -`20^@C`, pressure remaining constant

Explanation

To solve the problem of finding the volume of a gas at a different temperature while keeping the pressure constant, we can use Charles's Law. Here’s a step-by-step solution:

### Step 1: Identify the given values
- Initial volume (V1) = 3 liters
- Initial temperature (T1) = 0°C
- Final temperature (T2) = -20°C

### Step 2: Convert temperatures from Celsius to Kelvin
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