When heated, KClO3 decomposes into KCl and 0₂. 2 KClO3 2 KCl +30₂ this reaction produced 78.4 g KCl, how many grams of O₂ were produced?

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".