Practice: 0.100 mol of magnesium metal and a volume of aqueous hydrochloric acid that contains 0.500 mol of HCl are combined and react to completion. How many liters of hydrogen gas, measured at STP, are produced? Mg(s) + 2HCl(aq)] MgC12(aq) + H2(g) (R = 0.08206 L atm/mol K)? A) 2.24 L of H2 B) 4.48 L of H2 C) 5.60 L of H2 D) 11.2 L of H2 E) 22.4 L of H2

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