Answer
V2= 300 mL
Procedure
Assuming that the gas is ideal given the parameters. Boyle's Law can be used to determine the current pressure or volume of a gas at a constant temperature.
[tex]P1V1=P2V2[/tex]Solving for V2 and substituting the data in the equation
[tex]V2=\frac{P1V1}{P2}=\frac{4\text{ }atm(600mL)}{8\text{ }atm}=300\text{ }mL[/tex]