For this question, we can use Boyle's Law formula to answer, since this law is an experimental gas law that states that pressure and volume have an inverse relationship. The formula is:
P1V1 = P2V2
We have:
P1 = ?
V1 = 1000 mL
P2 = 160 atm
V2 = 700 mL
Now we add these values into the formula:
P1*1000 = 160*700
P1 = 112 atm