Chances are it turns to water:

4HO --> 2H2O + O2
4 hydrogen peroxide molecules naturally break down to two water (h2o)
molecules, and one oxygen molecule (o2)

Sounds like manganese dioxide speed up this reaction.

-Adam

Alexandre Domingos F. Souza wrote:

>>The simplest way to make oxygen is to combine manganese dioxide and topical
>>hydrogen peroxide in a bottle with a stopper and outlet tube. It foams and
>>the oxygen is released quickly. To maintain oxygen flow, drip hydrogen
>>peroxide into the container continuously. The manganese dioxide powder is a
>>catalyst and doesn't need renewal.
>>
>
>        Nice...but if the hydrogen peroxide has hydrogen, where does the hydrogen goes to???
>
>
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>Alexandre Souza
>taito@terra.com.br
>http://planeta.terra.com.br/lazer/pinball/
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