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                                    Ko2 used in mountaineers breathing equipments | 
                            
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Answer»  combustion in dry AIR to potassium superoxide, KO2, which is used in respiratory equipment because it liberates oxygen and REMOVES carbon dioxide and water vapour. (The superoxide of potassium is a YELLOW solid consisting of K+and O2− ions. It also can be FORMED by oxidation of potassium amalgam with dry  | 
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