Magnesium metal (0.100 mol) 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) → MgCl₂(aq) + H₂(g) A)2.24 L of H ₂ B)4.48 L of H ₂ C)5.60 L of H ₂ D)11.2 L of H ₂ E)22.4 L of H ₂

Question

Quizplus · Accepted Answer

The balanced chemical equation shows that 1 mol of Mg reacts with 2 mol of HCl to produce 1 mol of H2. Therefore, 0.100 mol of Mg will react with 0.200 mol of HCl to produce 0.100 mol of H2. At STP, 1 mol of any gas occupies 22.4 L. Therefore, 0.100 mol of H2 will occupy 2.24 L.

Magnesium Metal (0