Perhaps you have noticed the dull, white substance that appears on an aluminum screen door. This substance is aluminum oxide, Al2O3, and it forms from the reaction of aluminum metal, Al, and oxygen, O2. Which of these chemical equations is correct for this reaction?
A. Al + O2 → Al2O3
B. 2 Al + O2 → Al2O3
C. 2 Al + 3 O → Al2O3
D. 4 Al + 3 O2 → 2 Al2O3
Answers: 2
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