Kry’s experiment involves preparing oxygen gas from the decomposition of solid potassium chlorate as shown. How much KClO3 (122.55 g/mol) should decompose if Kry aims to produce 2.50 g KCl (74.55 g/mol) at 70% reaction yield?

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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".