HCl + Na2S --> H2S + NaCl is given. According to this reaction, if 5 moles of hydrochloric acid reacts with 5 moles of sodium sulphide, how many moles of hydrogensulphide (H2S) is formed? (ATTENTION: The reaction is not balanced, first balance the reaction!)    A) 1  B) 3  C) 1.25  D) 2.5  E) 5

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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".