I don't understand how to get the solution

Question

A 16.0 L helium tank is pressurized to 22.0 atm. When connected to this tank, a balloon will inflate because the pressure inside the tank is greater than the atmospheric pressure pushing on the outside of the balloon. Assuming the balloon could expand indefinitely and never burst, the pressure would eventually equalize causing the balloon to stop inflating. What would the volume of the balloon be when this happens? Assume atmospheric pressure is 1.00 atm. Also assume ideal behavior and constant temperature. 



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Answer 1

What info are we given?

Initial volume = 16.0 L

Initial pressure = 22.0 atm

Final pressure = 1.00 atm

What are we asked to find?

Final volume = ?

P1V1 = P2V2 (Boyles law)

(22.0)(16.0) = (1.00)(V2)

V2 = 352 L