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When hydrochloric acid reacts with zinc metal, zinc chloride and hydrogen gas are produced. How many moles of hydrochloric acid are needed to react with 2.3 moles of zinc?

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2HCl+Zn-ZnCl2+H2
2mol of HCl-1mol of Zn
2.3mol of Zn
2.3 times 2 = 4.6mol of HCl

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