Final answer:
The chemical equation (4Al) + (3O2) → (2Al2O3) is balanced because there is an equal number of Al and O atoms on both the reactant and product sides of the equation.
Step-by-step explanation:
The chemical equation provided, (4Al) + (3O2) → (2Al2O3), is indeed a balanced equation. We can determine if it's balanced by making sure there are equal numbers of each type of atom on both sides of the reaction.
For aluminum (Al), there are 4 Al atoms on the reactant side (4Al) and also 4 Al atoms on the product side (2 molecules of Al2O3, with each molecule containing 2 Al atoms). For oxygen (O), there are 6 O atoms on the reactant side (3 molecules of O2, with each molecule containing 2 O atoms) and 6 O atoms on the product side (2 molecules of Al2O3, with each molecule containing 3 O atoms). All atoms are balanced and coefficients are in the simplest whole-number ratio, confirming the equation is balanced.