Question

When a mixture of Aluminium powder and Iron (III) oxide is ignited, it produces molten iron and aluminium oxide. In an experiment,5.4 gram of aluminium was mixed with 18.5 gram iron (III) oxide. At the end of reaction, the mixture contained 11.2 gram of iron, 10.2 gram of aluminium oxide and an undetermined amount of unreacted iron (III) oxide. No aluminium was left. What is the mass of iron (III) oxide?​

Answer 1

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