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Aluminum reacts with oxygen to produce aluminum oxide. 4Al(s) + 3O2(g) → 2Al2O3(s) A mixture of 82.49 g of aluminum (м = 26.98 g/mol) and 117.65 g of oxygen (м = 32.00 g/mol) react according to this equation. Identify the limiting reactant and determine the mass of the excess reactant present in the vessel when the reaction is complete.