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Old Jul 11, 2012 | 9:42 pm
  #26  
eastport
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Originally Posted by InkUnderNails
H2O2, hydrogen and oxygen. Both are found in their free state in air. That's it unless it reacts with something and then it becomes rather obvious.

2 H2O2 → 2 H2O + O2
Perhaps I was being a little too subtle...
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