Complete the following reactions:
(i) `C_(2) H_(4) + O_(2) to`
(ii) `4Al + 3 O_(2) to`

Explanation

To complete the given reactions, we will follow the steps for each reaction separately.

### (i) Reaction of Ethene with Oxygen

1. **Identify the Reactants**: The reactants are ethene (C₂H₄) and oxygen (O₂).
2. **Determine the Type of Reaction**: This is a combustion reaction where a hydrocarbon reacts with oxygen to produce carbon dioxide (CO₂) and water (H₂O).
3. **Write the Unbalanced Equation**:
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