The net chemical equation for the production of aluminium from aluminium hydroxide and carbon is this:
4AL[OH]3 + 3C = 4AL + 6H2O + 3CO2.
Four molecules of aluminium hydroxide reacts with three molecules of carbon to produce four molecules of aluminium, six water molecules and three molecules of carbon dioxide. All the reactants and products are in solid state except water, which is given off as steam and carbon dioxide; these two are gases.