I need some help to solve this problem:
Iron reacts slowly with oxygen and water to form a compound commonly called rust (Fe2O3 * 4H2O) For 45.2 kg of rust. Calculate: a) the moles of compound; b) The moles of Fe2O3; c) the grams of Iron.
I'm not sure where to start, should I frist balance the chemical equation Fe+O2+H2O -> Fe2O3 * 4H2O?