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fuzzy666
Calculate the mass of iron metal (in grams) that can be prepared from 150 grams of aluminum and 250 grams of iron(III) oxide.
now atomic mass of iron oxide (Fe2O3) is 160 the balanced equation is Fe2O3+2Al->Al2O3+2Fe so if you see the above equation 1 molecule of Fe2O3 produces 2Fe i.e. they are in the ratio of 1:2 Now convert Fe2O3 mass given in grams to moles by dividing 250 from 160 = 250/160 you will get moles of Fe2O3. Now multiply this by 2 & further by atomic mass of iron. (250/160)*2*56=answer