a) FexOy + yH2 → xFe + yH2O
b) 2CxHy +\(\frac{4x-y}{2}O_2\) → 2xCO2 + yH2O
c) 2CxHyOz + \(\frac{4x+y-2z}{2}\)O2 → 2xCO2 + yH2O
d) FexOy + 2yHCl → xFeCl2y/x + yH2O
đ) CnH2n+2 + \(\frac{3n+1}{2}\)O2 → nCO2 + (n+1)H2O
e) 2CnH2n + 3nO2 → 2nCO2 + 2nH2O
f) CnH2n - 2 + \(\frac{3n-1}{2}\)O2 → nCO2 + (n-1)H2O