in response to Tabby

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so in order to find out how many moles of O2 are produced from 12 moles of KClO3:
2 mols KClO3 form 3 mols O2
4 mols KClO3 form ? mols O2
Do you double the mols of O2
4 mols KClO3 form 6 mols O2?
6 mols KClO3 form 9 mols O2

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