A breathing mixture used by deep sea divers has a total pressure of 101.4 kPa and contains hellum, oxygen and carbon doxide. What is the partial pressure of oxygen if #P_(He) = 82.5 kPa# and #P_(CO_2) = 0.4 kPa#?
In commercial diving mixes I am not sure that carbon dioxide would be added in those quantities. I used to do a lot of recreational scuba diving, and of course we filled our tanks with compressed air. Commercial divers, nowadays, use so-called