Which sample contains the greatest number of carbon atoms?
15.0 g of C6H12O615.0\text{ g of } \text{C}_6\text{H}_{12}\text{O}_615.0 g of C6H12O6
30.0 g of C3H830.0\text{ g of } \text{C}_3\text{H}_830.0 g of C3H8
40.0 g of C2H5OH40.0\text{ g of } \text{C}_2\text{H}_5\text{OH}40.0 g of C2H5OH
50.0 g of HCHO50.0\text{ g of } \text{HCHO}50.0 g of HCHO
199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.