42.6 g Cu are combined with 84.0 g of HNO3 according to the reaction:   3 Cu + 8 HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H2O   Which reagent is limiting and how many grams of Cu(NO3)2 are 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".