Hydrogen gas is produced when 295.0 mL of a 0.6399 M HCl solution reacts according to Zn(s) + 2 HCl(aq) → ZnCl₂(aq) + H₂(g) If there is an excess amount of Zn, what mass of H₂ will be produced? g H₂

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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".