doobyvaldez doobyvaldez

15-05-2017
Chemistry

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3Fe3O4 + 8Al = 4Al2O3 + 9Fe ... why is Fe 9

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maddigascarthegreat maddigascarthegreat

15-05-2017

Because the subscript is 3 and the coefficient is 3. To figure out how many atoms each element contains, we multiply those numbers together. They are balanced and there are 9 iron atoms on each side.

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