To solve this problem, we can use the ideal gas law formula and convert the given pressure from psia to atm.
Then, we can calculate the number of moles of air at the initial pressure and volume using the ideal gas law.
Finally, we can use the ideal gas law again to calculate the volume of the air at the new pressure.
To solve this problem, we can use the formula for the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
We can rearrange the formula to solve for n, the number of moles, by dividing both sides by RT.
By converting the given pressure from psia to atm, we can then substitute the values into the formula to solve for the number of moles of air.
Finally, we can use the ideal gas law again to calculate the volume of the air at the new pressure of 120 psia.