43.61 L
[tex]P=\frac{k}{V}[/tex]
k = P1V1 = P2V2
In this case we are given;
Initial pressure, P1 = 3.50 atm
Final pressure, P2 = 8.34 atm
Final volume, V2 = 18.3 L
We are required to calculate the initial volume, V1,
Rearranging the formula;
[tex]V1=\frac{P2V2}{P1}[/tex]
Therefore;
[tex]Initial volume=\frac{(8.34atm)(18.3L)}{3.50atm}[/tex]
[tex]=43.606[/tex]
Initial volume = 43.61 L