Al + O2 ---> Al2O3
Balance the chemical equation.
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4AI + 3O2 ----> 2AI2O3
To balance the chemical equation Al + O2 → Al2O3, we need to ensure that there are an equal number of atoms on both sides of the equation. Here's how you can balance the equation step by step:
1. First, let's count the number of atoms for each element on both sides of the equation:
Al: 1 on the left, 2 on the right
O: 2 on the left, 3 on the right
2. To balance the Al atoms, we can place a coefficient of 2 in front of the Al on the left side. Now the equation becomes:
2Al + O2 → Al2O3
3. Now let's recheck the number of atoms for oxygen:
O: 2 on the left, 3 on the right
4. Since the number of O atoms is not equal, we need to balance them by placing a coefficient of 3 in front of the O2 on the left side. The equation is now balanced:
2Al + 3O2 → Al2O3
Now there are an equal number of atoms of each element (2 Al atoms and 6 O atoms) on both sides of the equation, and it is balanced as required.