This question is about the extraction of metals.
Element Y is extracted from its oxide by reduction with carbon. The equation for the reaction is:
YO2+C→Y+CO2 \text{YO}_2 + \text{C} \rightarrow \text{Y} + \text{CO}_2 YO2+C→Y+CO2The sum of the relative formula masses (MrM_rMr) of the reactants (YO2+C\text{YO}_2 + \text{C}YO2+C) is 99. Calculate the relative atomic mass (ArA_rAr) of Y. Relative atomic masses (ArA_rAr): C=12\text{C} = 12C=12, O=16\text{O} = 16O=16
Identify element Y using your answer to Part 1 and a periodic table.
Carbon can also be used to extract iron (Fe\text{Fe}Fe) from iron(III) oxide (Fe2O3\text{Fe}_2\text{O}_3Fe2O3). The equation for the overall reaction is:
Fe2O3+3C→2Fe+3CO \text{Fe}_2\text{O}_3 + 3\text{C} \rightarrow 2\text{Fe} + 3\text{CO} Fe2O3+3C→2Fe+3COCalculate the percentage atom economy for extracting iron in this reaction. Give your answer to 2 significant figures. Relative atomic masses (ArA_rAr): C=12\text{C} = 12C=12, O=16\text{O} = 16O=16, Fe=56\text{Fe} = 56Fe=56