Read the information below, then answer the question. A laboratory assistant was experimenting with chemical reactions when she combined a small amount of zinc hydrochloric acid (HCI). She discovered that zinc chloride (ZnCl2) and hydrogen (H2) were produced. Equations Which of the following substances are the reactants? O Zn + HCI O ZnCl2 + HCI O ZnCl2 + H2 O Zn + H2 6. 8. 10 11

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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".