Step-by-step explanation:
We know that there are 14.696 psi in 1 atm. We can use that relationship to find the answer to our problem.
1 atm = 14.696 psi
P = 51.4 atm = 51.4 atm * 14.696 psi/(1 atm)
P = 755.37 psi = 755 psi
P = 755 psi
Answer: There are 755 psi in 51.4 atm.