A balloon filled with .500 L of air at sea level is submerged....?

Question

in the water to a depth that produces a pressure of 3.25 atm. What is the volume of the balloon at this depth?

Answer 1

P V= nRT =cte if temperature constant thats I suppose

at see level pressure 1 atm

at this depth the pressure is 3.5 +1 = 4.5 atm

and 0.5 * 1 = 4.5 * v

V = 0.5/4.5 = 0.12l