Jawabanmu

2014-07-10T21:19:12+07:00
CH4:
60/100 x 5 = 3 liter 
CH4 +   2O2   ->   CO2   +   2H2O   -> CO2 = 3 liter

C2H6:
40/100 x 5 = 2 liter atau 5-3= 2 liter
2C2H6 +   7O2   ->   4CO2   +   6H2O -> CO2 = 4 liter

CO2total = 3 + 4 = 7 liter