A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · May/June 2025 · Q151 Mark
The skeletal formulae of arginine and lysine are shown. [Figure showing skeletal formula of arginine] [Figure showing skeletal formula of lysine] Which row is correct?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A[substance: arginine, empirical formula: C3H7N2O, Mr: 174]
B[substance: arginine, empirical formula: C3H8N2O, Mr: 176]
C[substance: lysine, empirical formula: C3H7NO, Mr: 144]
D[substance: lysine, empirical formula: C3H8NO, Mr: 146]
✓ Correct answer
A: [substance: arginine, empirical formula: C3H7N2O, Mr: 174]
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Atoms, molecules and stoichiometry and see which topics are most likely to come up next.
Sign up free →