The balanced chemical equation for the reduction of copper(II) oxide using carbon is:
2CuO+C→2Cu+CO2 2\text{CuO} + \text{C} \rightarrow 2\text{Cu} + \text{CO}_2 2CuO+C→2Cu+CO2Calculate the percentage atom economy of this process to produce copper .
atom economy (%)=total formula mass of desired producttotal formula mass of all reactants or products×100 \text{atom economy (\%)} = \frac{\text{total formula mass of desired product}}{\text{total formula mass of all reactants or products}} \times 100 atom economy (%)=total formula mass of all reactants or productstotal formula mass of desired product×100Give your answer to 2 significant figures.
(Relative atomic masses, ArA_rAr: C=12\text{C} = 12C=12; O=16\text{O} = 16O=16; Cu=64\text{Cu} = 64Cu=64)
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.