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Chromium metal can be produced from the high temperature reaction of Cr 2O3 [chromium(III) oxide] with silicon or aluminum by each of the following reactions:
Cr2O3 + 2Al → 2Cr + Al2O3
2Cr2O3 + 3Si → 4Cr + 3SiO2
Calculate the number of grams of aluminum required to prepare 133 g of chromium metal by the first reaction.
Calculate the number of grams of silicon required to prepare 133 g of chromium metal by the second reaction.