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On Fire Shuffle Atoms (2) 
The illustration above shows a methane molecule that has oxidized completely. Sometimes the combustion of a fuel is not complete. For example, if the fuel mixture is too rich—that is, the fuel-to-oxygen ratio is too high—there will not be enough oxygen to allow the fuel to fully oxidize. This can result both in the formation of carbon monoxide (CO) instead of CO2 and in a sooty flame. Next, find out what make fire visible with a Flame Experiment. Strike a Match | Chain Reaction | Flame Experiment
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