MediumChemistryHigh School (11–12)Atoms and Molecules › Stoichiometry and ConcentrationAtoms and Molecules › The Mole ConceptNumericalappliedBoard ExamAPA-LevelIB
In a blast furnace, carbon monoxide takes the oxygen from haematite: Fe₂O₃ + 3CO → 2Fe + 3CO₂…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
In a blast furnace, carbon monoxide takes the oxygen from haematite: . How much iron comes from of , and how much carbon monoxide does it need? Use , and .
Need a reminder? The key ideaShow
The coefficients of a balanced equation give the mole ratio. Mass to moles, moles by the mole ratio, then moles to mass. At STP one mole of a gas fills . The limiting reagent has the smallest moles divided by its coefficient; it is used up and fixes the product.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Ore. .
Step 2. Iron. , which is .
Step 3. Carbon monoxide. , which is .
Answer: of iron, using of carbon monoxide.
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