Aluminum is mined as the mineral bauxite, which consists primarily of Al2O3 (Alu

Question

Aluminum is mined as the mineral bauxite, which consists primarily of Al2O3 (Alumina). The aluminum can be refined by heating the bauxite to drive off the oxygen. 2 Al2O3 ---> 4 Al + 3 O2 How much aluminum is produced from 4.40 x 10^3 kg of Al2O3::::::I got 2.3 x 10^3 which is correct. b) The oxygen produced in part (a) is allowed to react with carbon to produce carbon monoxide. Write a balanced equation describing the reaction of alumina with carbon: Al2O3 + 3 C----->2 Al + 3 CO ****************************** WHERE I AM STUCK IS HERE!!!! How much CO is produced from alumina in part (a) I tried 1.90x10^3kg CO and its wrong :(

Explanation / Answer

2Al2O3 --> 4Al + 3O2 stoichiometry uses the balanced equation to compare moles of reactants and products to determine the amount of reactants required and products formed. 2050kg = 2050000g Al2O3 2050000g / 102g/mole = 2x10^5moles 2x10^5moles x (4Al / 2Al2O3) x 27g/mole x 1kg / 1000g = 1085.3kg 2x10^5moles x (3O2 / 4Al) x 32g/mole x 1kg/1000g = 4800kg

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