Zinc can be obtained by heating zinc oxide with carbon.
The balanced equation for the reaction is:
2ZnO+C→2Zn+CO2 2\text{ZnO} + \text{C} \rightarrow 2\text{Zn} + \text{CO}_2 2ZnO+C→2Zn+CO2Calculate the atom economy for the production of zinc in this reaction.
Relative atomic masses (ArA_rAr): C=12\text{C} = 12C=12, O=16\text{O} = 16O=16, Zn=65\text{Zn} = 65Zn=65
Relative formula masses (MrM_rMr): ZnO=81\text{ZnO} = 81ZnO=81, CO2=44\text{CO}_2 = 44CO2=44
Give your answer to two significant figures.
Practise Edexcel GCSE Chemistry Quantitative analysis with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.