If you need to produce 355 grams of oxygen gas (O2) in the electrolysis reaction of water by an electric current. If the reaction is run at 125 degrees Celsius in a reactor volume 22500ml. What is the pressure of the produced oxygen in mm Hg?

Answer 1

Can't you use PV = nRT and solve for P(in atm) and convert to mm Hg.
n = grams O2/molar mass O2