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Writing the equation of combustion of propane (C3H8), we get:

1. C3H8 + 5O2 → 3CO2 + 4H2O
2. C3H8 + 3O2 → 3CO + 4H2O
3. C3H8 + 4O2 → 3CO2 + 4H2O
4. C3H8 + 6O2 → 3CO2 + 4H2O

Correct answer: C3H8 + 5O2 → 3CO2 + 4H2O

Solution

The complete combustion of propane (C3H8) produces carbon dioxide (CO2) and water (H2O) in a balanced reaction: C3H8 + 5O2 → 3CO2 + 4H2O.

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