The new volume is 0.25 L
calculation
The new volume is calculated using the Boyles law formula
that is P1V1= P2V2 where,
P1 = 250 atm
V1 = 0.05 L
P2 = 50.0 atm
V2 = ? L
make V2 the subject of the formula by dividing both side by P2
V2= P1V1/ P2
V2 = [( 0.05 L x 250 atm) / 50.0 atm] = 0.25 L