This question is a bit general but hopefully someone can point me in the right direction.
If you have a metal container, welded shut that's fitted into a hole that is say 10 meters wide and 30 meters deep.
This has the volume of about 21,205
If you pump pure oxygen into the tank until all the water was pushed out of that cylinder, what would be the pressure of the oxygen in the tank. How much oxygen would be in the tank?