A 0.215 g sample of zinc metal reacted with excess hydrochloric acid according to the following balanced chemical reaction: Zn(s) + 2 HCl(aq)-->ZnCl2(aq) + H2(g) The volume of hydrogen gas collected over water was 80.5 mL at 20oC and a barometric pressure of 756 mmHg. Calculate the theoretical yield, actual yield, and percent yield for the reaction.

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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".