A laboratory technician analyses an 18.4 g sample of ammonium nitrate, NH4NO3\mathrm{NH_{4}NO_{3}}NH4NO3. Relative atomic masses (ArA_rAr): H = 1.0, N = 14.0, O = 16.0.
Calculate the mass of nitrogen in the sample. Give your answer to 3 significant figures.
136 exam-style questions on OCR GCSE Chemistry 6.1 Improving processes and products, covering 6.1.1 Extracting metals industrially and by electrolysis, 6.1.2 Life cycle assessment and recycling, 6.1.3 Biological methods of metal extraction, 6.1.4 The Haber process and the production of fertilisers, 6.1.5 Alloys and their uses, 6.1.6 Corrosion and its prevention, 6.1.7 Comparing and selecting materials, and 6.1.8 Industrial conditions, rate and position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.