Ammonium nitrate is a chemical compound used widely in agricultural fertilisers.
What is the percentage by mass of nitrogen in ammonium nitrate, NH4NO3\text{NH}_4\text{NO}_3NH4NO3?
(Relative atomic masses, ArA_{\text{r}}Ar: H=1.0\text{H} = 1.0H=1.0, N=14\text{N} = 14N=14, O=16\text{O} = 16O=16)
17.5%17.5\%17.5%
35.0%35.0\%35.0%
58.3%58.3\%58.3%
70.0%70.0\%70.0%
258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.