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The reduction of iron (III) oxide (Fe2O3) to pure iron during the first step of steelmaking, 2 Fe2O3(s) → 4 Fe(s) + 3 O2(g) is driven by the high-temperature combustion of coke, a purified form of coal: C(s) + O2(g) → CO2(g) Suppose at the temperature of a blast furnace the Gibbs free energies of formation ∆Gf of CO2 and Fe2O3 are -442 kJ/mol and -849 kJ/mol, respectively. Calculate the maximum mass of pure iron that can be produced by the combustion of 7900 kg of coke.