Volume of certain amount of a gas at `25^@C` and 100 cm Hg pressure is 80 mL. The gas is expanded to 160 mL keeping the temperature constant. Calculate the pressure of the expanded gas.

Explanation

To solve the problem, we will use Boyle's Law, which states that the pressure of a gas multiplied by its volume is a constant when the temperature is held constant. The formula can be 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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