Question 12 • Physical Science
Complete combustion of a hydrocarbon produces carbon dioxide and water. In the equation, 2 C₄H₁₀ contains 8 carbon atoms, so the missing product must include 8 CO₂ to balance the carbon: 2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O. Therefore, the missing product is carbon dioxide.
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