The volume of a certain amount of a gas at `25^@C` and at 100 cm pressure is 80 mL. The gas is expanded to 140.5 mL keeping temperature constant. Calculate the pressure of the expanded gas.

Explanation

To solve the problem, we will use Boyle's Law, which states that for a given mass of gas at constant temperature, the product of pressure and volume is constant. This can be mathematically expressed as:

\[ P_1 V_1 = P_2 V_2 \]

Where:
- \( P_1 \) = initial pressure
- \( V_1 \) = initial volume
- \( P_2 \) = final pressure (which we need to find)
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