Iron is required for the production of steel.
Iron can be obtained by reducing iron(III) oxide with carbon monoxide in a blast furnace.
Fe2O3+3CO→2Fe+3CO2 \text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2 Fe2O3+3CO→2Fe+3CO2Calculate the percentage atom economy for the production of iron, Fe\text{Fe}Fe, in this reaction.
(relative atomic masses: C=12.0\text{C} = 12.0C=12.0, O=16.0\text{O} = 16.0O=16.0, Fe=55.8\text{Fe} = 55.8Fe=55.8
relative formula masses: CO=28.0\text{CO} = 28.0CO=28.0, Fe2O3=159.6\text{Fe}_2\text{O}_3 = 159.6Fe2O3=159.6)
Give your answer to two significant figures.
157 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.