Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be________________? August 19, 2021February 11, 2019 by admin Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be________________? A. 9.5 : 1 B. 12.5 : 1 C. 15.5 : 1 D. 18.5 : 1