have a question about theoretical yield. I know we are supposed to always start with the limiting reagent when calculating. My question is, if both substances are consumed completely in a reaction, which one do we start with when calculating theoretical yield? Since there is no limiting reagent.

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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".