Of every other reagent Oxygen masks for producing O2 in emergency situations contain potassium superoxide, KO2. It reacts with carbon dioxide and water in exhaled air to produced oxygen.
4KO2 + 2H2O+ 4CO2 = 4KHCO3 + 3CO2
If a person wearing such a mask exhales 0.702 g of carbon dioxide per minute, how many g of oxygen are produced in 5 minutes? Assume you hae plenty of ever other reagent.