When the equation, ___O2 + ___C5H12 ? ___CO2 + ___H2O is balanced, the coefficient: of O2 is: Chemistry Chapter 7 When the equation, ___O2 + ___C5H12 ? ___CO2 + ___H2O is balanced, the coefficient: of O2 is: A) 3 B) 4 C) 5 D) 8 E) none of the above Answer: D Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+