Since 1982 pennies change from being pure copper to Zinc with a copper coating. On average there is about 3.10 grams of zinc in each penny. If zinc is exposed and a penny is dropped into 4.00 g of hydrochloric acid will the acid dissolve all of the zinc? What mass of excess reactant remains once the reaction stops ? What mass of each product is made

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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".