The Complete Combustion of Octane,C₈H₁₈,yields Carbon Dioxide and Water

Multiple Choice

The complete combustion of octane,C₈H₁₈,yields carbon dioxide and water:
_- C₈ H₁₈ + _- O₂→ _- CO_{2 + -} H₂O
The smallest whole-number coefficient of oxygen in the balanced equation is

A) 24.
B) 26.
C) 22.
D) 23.
E) 25.