12) SEP Apply Mathematical Concepts This equation shows the formation of aluminum oxide, which is found on the surface of aluminum objects exposed to the air. 4Al(s) + 302(g) → 2AI½O3(s) a. Write the six mole ratios that can be derived from this equation. b. How many moles of aluminum are needed to form 3.7 mol Al203?

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".