Industrial Scale

Factories count in tons: 1 ton = 1000 kg = $1 \times 10^{6}\ \mathrm{g}$. The balanced equation and its mole ratio are the same as in a test tube.

Aluminum comes from splitting molten aluminum oxide: 2Al₂O₃ → 4Al + 3O₂. For 1 ton of Al: $1 \times 10^{6}\ \mathrm{g}$ ÷ 27 = $3.70 \times 10^{4}$ mol Al, so $1.85 \times 10^{4}$ mol Al₂O₃.

Times 102 g/mol: $1.89 \times 10^{6}\ \mathrm{g}$, which is 1.89 tons of Al₂O₃ for every ton of aluminum.

About 1.89 tons of Al₂O₃ for every ton of aluminum