By the use of the Boyle's law, the new pressure is 70 kPa.
The gas law enables us to calculate the parameters that has to do with gases.
In this case;
V1 = 2.2 L
P1 = 140 kPa
V2 = 4.4 L
P2 = ?
Using the Boyle's law;
P1V1 = P2V2
P1V1/V2 = P2
P2 = 140 kPa * 2.2 L/4.4 L
P2 = 70 kPa
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