In an iron thermit, how many moles of aluminium reacts with three moles of iron oxide to give nine moles of iron?

In an iron thermit, how many moles of aluminium reacts with three moles of iron oxide to give nine moles of iron? Correct Answer 8

The thermit process, which is used for welding depends on the chemical reaction between oxide of iron and aluminium metal. According to this reaction, when 8 moles of aluminium reacts with 3 moles of iron oxide, then, 4 moles of aluminium oxide and 9 moles of iron is formed.
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