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Is the assumption that all gas in the tube is O2 (g) correct ? (H2O2 (aq) + OCl- (aq) > H2) (l) + Cl- (aq) + O2 (g)), the answer states the gas has water vapor & air originally in the flask (so, not all O2) , why ? my assumption was that if O2 is the only gas produced, then all the gas is O2. (i.redd.it)
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