Problem- chromium metal can be produced from the high, Chemistry

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Problem- chromium metal can be produced from the high

Problem- Chromium metal can be produced from the high temperature reaction of Cr2O3 with silicon or aluminum by each of the following reactions:

Cr2O3 + 2 Al ___ 2 Cr + Al2O3

2 Cr2O3 + 3 Si _____ 4 Cr + 3 SiO2

1. Calculate the number of grams of aluminum required to prepare 279g of chromium metal by the first reaction?

2. Calculate the number of grams of silicon required to prepare 279g of chromium metal by the second reaction?

I just need a general explanation of it please- Thanks

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Chemistry: Problem- chromium metal can be produced from the high

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