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Where is the element oxygen found, and how is it produced?

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Oxygen gas can also be produced through electrolysis of water into molecular oxygen and hydrogen. DC electricity must be used: if AC is used, the gases in each limb consist of hydrogen and oxygen in the explosive ratio 2:1. read more

Oxygen can also be produced through the electrolysis of water or by heating potassium chlorate (KClO 3). Oxygen is a highly reactive element and is capable of combining with most other elements. It is required by most living organisms and for most forms of combustion. read more

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Further Research

Chemistry for Kids: Elements
www.ducksters.com

Facts About Oxygen
www.livescience.com

How oxygen is made
www.madehow.com