Balance the following chemical equations. (fill in the blanks as needed)
a) ____AlCl3 + ____H2O → ____Al(OH)3 + ____HCl

b) ____C3H8 + ____O2 → ____CO2 + ____H2O

c) ____Al + ____FeO → ____Al2O3 + ____Fe

d) ____S8 + ____O2 → ____SO3

e) ____C7H6O2 + ____O2 → ____CO2 + ____H2O