metan
CH4+2O2--->CO2+2H2O
2CH4+3O2--->2CO+4H2O
CH4+O2--->C+2H2O
propen
2C3H6+9O2--->6CO2+6H2O
C3H6+3O2--->3CO+3H2O
2C3H6+3O2--->6C+6H2O