Chromium metal can be produced from the high temperature reaction of Cr2O3 [chromium(III) oxide] with silicon or aluminum by each of the following reactions: Cr2O3 + 2 Al ------> 2 Cr + Al2O3 2 Cr2O3 + 3 Si ------> 4 Cr + 3 SiO2 (a) Calculate the number of grams of aluminum required to prepare 363 g of chromium metal by the first reaction (b) Calculate the number of grams of silicon required to prepare 363 g of chromium metal by the second reaction

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13 Dec 2019

Chromium metal can be produced from the high temperature reaction of Cr₂O₃ [chromium(III) oxide] with silicon or aluminum by each of the following reactions:

Cr₂O₃ + 2 Al ------> 2 Cr + Al₂O₃

2 Cr₂O₃ + 3 Si ------> 4 Cr + 3 SiO₂

(a) Calculate the number of grams of aluminum required to prepare 363 g of chromium metal by the first reaction

(b) Calculate the number of grams of silicon required to prepare 363 g of chromium metal by the second reaction

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Hubert KochLv2

17 Dec 2019

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1. A compound is 47.08% carbon, 6.59% hydrogen and 46.33% chlorine. The molar mass of the compound is 153 grams/mol. Calculate the empirical and molecular formula for the compound.

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Cr₂O₃(s) + 3 CCl₄(l) â 2 CrCl₃(s) + 3 COCl₂(aq)

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C₆H₁₂O₆ â 2 C₂H₅OH + 2 CO₂

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(please use gravimetric factor formula, and steps explaining in detail.)