One source of aluminum metal is alumina, Al2O3. a. Determine the percentage composition of Al in alumina. b. How many pounds of aluminum can be extracted from 2.0 tons of alumina.?

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answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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a corroding iron, if that's one of your choices