Answer :
According to Boyle's law, a gas's pressure and the volume it takes up are inversely related. As a result, the correct answer is that the volume is three times larger than the actual volume when three more moles of the gas are added at a constant temperature and constant pressure.
Boyle's law can be stated as: Pressure is inversely proportional to the volume
P ∝ 1/V
At constant temperature and pressure, the volume of a gas is directly proportional to the number of moles of gas.
But, This equation also demonstrates how the gas pressure reduces proportionally as volume rises. Similar to this, the gas's pressure rises as volume falls. Thus, The volume is three times larger than the actual volume at a constant temperature and constant pressure.
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