Homework Help: Science

Posted by Megan on Wednesday, November 16, 2011 at 8:58pm.

Thermite is a mixture of iron(III) oxide and aluminum powders that is used in some countries to weld railroad tracks. It is a spectacular reaction to yield solid aluminum oxide that floats on the molten iron. When cooled, the iron is ground smooth and even with the rest of the rail.

Fe2O3 + 2 Al 2 Fe + Al2O3

(a) How many grams of iron form when 114 g of aluminum reacts?

(b) How many atoms of aluminum react for every 2.20 g of aluminum oxide formed?

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