Partial answer:
CxHy is used to indicate a generic hydrocarbon fuel.
A specific hydrocarbon would be, for example, C4H10. That is the molecular formula for Butane.
Combustion reaction
co2 and h2o
CO2 and H2O
Products of these are CO2, O2 and H2O Reactants of these are CO2, O2 and H2O (As they are the reverse of the other)
The balanced equation is 2 C4H10 + 13 O2 -> 8 CO2 + 10 H2O.
The coefficient of O2 is 5.The chemical equation is:C5H12 + 8 O2 = 5 CO2 + 6 H2O
H2O, CO2, N2, O2, C6H11O6 H2O, CO2, N2, O2, C6H11O6
This is called combustion. Combustion = burning an organic hydrocarbon in oxygen. Combustion yields stoichiometric amounts of carbon dioxide and water. .. CxHy + .. O2 --> .. CO2 + .. H2O insert the appropriate coefficients in .. spaces
They're opposites. (H2O + CO2 [+ sunlight]) -> sugars + O2) vrs (sugars + O2 = H2O + CO2)
the first takes CO2 and H2O to give sugar and O2 the other takes sugar plus O2 and gives CO2 and H2O
c2h5oh+h2o
C3H8 + 5O2 = 3CO2 + 4H2O, so the coefficient for O2 is 5