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Hydrogen! Splitting water into oxygen and hydrogen is achieved by electrolysis (see reaction below). In fact, its the most important source of hydrogen gas.

2H2O(l) → 2H2(g) + O2(g)

Find out more at http://en.wikipedia.org/wiki/Electrolysis_of_water

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Does still water have more oxygen than flowing water?

Flowing water generally has more dissolved oxygen than still water because moving water allows more oxygen to be absorbed from the air. Still water can become depleted of oxygen over time due to lack of replenishment, especially in stagnant or enclosed areas.


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To determine if oxygen absorbers are still effective, you can check if they are still pliable and have not hardened. Additionally, you can perform a simple test by placing the oxygen absorber in a sealed container with a small amount of water and observing if it creates a vacuum seal. If it does, then the oxygen absorber is still effective.


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