The combustion reaction of propane is described by the reaction. c3h8 + 5o2 → 4h2o + 3co2. how many moles of o2 are required to generate 3 moles of co2? a. 2.5 moles b. 3 moles c. 4 moles d. 5 moles

C₃H₈   +   5 O₂   →   4 H₂O   +   3 CO₂

mole ratio based on balance equation of  O₂   :   CO₂ i  s    5  :  3
                      C₃H₈   +   5 O₂   →   4 H₂O   +   3 CO₂

∴ if moles of CO₂  =  3 moles
 
then moles of O₂  = (3 moles ÷ 3) × 5
                             
                             =  5 moles   (OPTION D)