3- Complete combustion of 3 moles of cycloheptatriene (C7H8) would require how many moles of oxygen, and produce how many moles of water? a. 27 moles of oxygen and 21 moles of water b. 27 moles of oxygen and 12 moles of water c. 9 moles of oxygen and 12 moles of water d. 9 moles of oxygen and 4 moles of water