Which of the following reactions gives the largest amount of pure oxygen gas why the reactions 2na2o2 plus 2h2o or 4ko2 plus 2h2o or 4ko2 plus 2co2 or 2 na2o2 plus 2co2?

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Which of the following reactions gives the largest amount of pure oxygen gas why the reactions 2na2o2 plus 2h2o or 4ko2 plus 2h2o or 4ko2 plus 2co2 or 2 na2o2 plus 2co2? resources

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