Answer:
C₈H₁₈
Explanation:
Octane is an alkane which which is combustible in air.
The combustion of octane C₈H₁₈ in sufficient supply of oxygen produces carbon (IV) Oxide and water only.
Sufficient supply of oxygen ensures there is complete combustion of octane.
2C₈H₁₈ ₍l₎ + 25O₂₍g₎ → 16CO₂₍g₎ + 18H₂O₍l₎