Answer:
This is a problem involving Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at constant temperature. Mathematically, this can be expressed as P1V1 = P2V2, where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.
Using this formula, we can solve for P2 as follows:
P1V1 = P2V2
(10 atm)(20 L) = P2(5.0 L)
200 atm·L = 5.0 L·P2
P2 = 40 atm
Therefore, the pressure when the gas occupies a volume of 5.0 L is 40 atm.
Hope this helps you! Sorry if it's wrong. If you need more help, ask me! :]