Which equation is balanced? Al+CuOarrow Al_(2)O_(3)+Cu Miss Zoo was wading in the pool. __ 2Al+CuOarrow Al_(2)O_(3)+3Cu The victim was not attacked by a cougar. __ Al+3CuOarrow AlO+3Cu Coach Physics was drinking water in the atrium. 2Al+3CuOarrow Al_(2)O_(3)+3Cu There was no venomous bite involved.

## Step 1: Identify correct balanced equation### For a chemical equation to be balanced, the number of atoms for each element on the reactant side must be equal to the number of atoms of the same element on the product side.## Step 2: Check each provided equation### 1. - Reactants: 1 Al, 1 Cu, 1 O - Products: 2 Al, 3 O, 1 Cu - Not balanced.2. - Reactants: 2 Al, 1 Cu, 1 O - Products: 2 Al, 3 O, 3 Cu - Not balanced.3. - Reactants: 1 Al, 3 Cu, 3 O - Products: 1 Al, 1 O, 3 Cu - Not balanced.4. - Reactants: 2 Al, 3 Cu, 3 O - Products: 2 Al, 3 O, 3 Cu - Balanced.## Step 3: Conclusion### Only the fourth equation is balanced.