PLEASE help!! "A gas has an initial pressure of 296 atm, is now at 1246 atm (final pressure) and a final volume of 72 L, what is the initial volume of this gas?"

Imagine that the rightward current flows in the rod for a short time. as a result, what will the net charge on the right and left ends of the rod become? left end negative and right end positive left end negative and right end negative left end negative and right end nearly neutral left end nearly neutral and right end positive both ends nearly neutral