Urea, CO(NH2)2\text{CO(NH}_2)_2CO(NH2)2, is an essential nitrogen-rich compound used globally as a fertilizer. It is produced industrially by reacting ammonia with carbon dioxide under high pressure.
The chemical equation for this synthesis is: 2NH3(g)+CO2(g)→CO(NH2)2(s)+H2O(l)2\text{NH}_3(\text{g}) + \text{CO}_2(\text{g}) \rightarrow \text{CO(NH}_2)_2(\text{s}) + \text{H}_2\text{O}(\text{l})2NH3(g)+CO2(g)→CO(NH2)2(s)+H2O(l)
Calculate the percentage atom economy for the production of urea by this process.
Give your answer to 3 significant figures.
Relative formula masses (MrM_rMr):
Practise AQA GCSE Chemistry Yield and atom economy of chemical reactions (chemistry only) with exam-style questions for Foundation and Higher tier. 32 questions covering Percentage yield and Atom economy, matched to the AQA GCSE Chemistry (8462) 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.