Answer:
The volume is 8,0 L.
Explanation:
We apply Boyle Mariotte's Law: for a given mass of gas at constant temperature, its pressure and volume vary inversely proportionally (the higher the pressure, the lower the volume and vice versa):
P1 x V1 = P2 xV2
V2 = (P1 x V1)/P2
V2 = ( 0,80 atm x 4,0 L)/ 0,40 atm
V2= 8,0 L
