find the amount of energy needed to break down rust, iron (III) oxide, Fe2O3(s), to form 50.0 g of oxygen gas. Given: the molar mass of iron and oxygen is 55.85 g/mol and 16.00 g/mol respectively; and the enthalpy of formation of Fe2O3 is -824.2 kJ/mol.

Consider the following multistep reaction: a b→ab(slow) a ab→a2b(fast)−−−−−−−−−−−−−−−−− 2a b→a2b(overall) based on this mechanism, determine the rate law for the overall reaction. express your answer in standard masteringchemistry format. for example, if the rate law is k[a]3[b]2 type k*[a]^3*[b]^2