Which sample contains the greatest number of hydrogen atoms?
24.0 g of CH3COOH24.0\text{ g of }\text{CH}_3\text{COOH}24.0 g of CH3COOH
18.6 g of CH3NH218.6\text{ g of }\text{CH}_3\text{NH}_218.6 g of CH3NH2
25.3 g of C2H5OH25.3\text{ g of }\text{C}_2\text{H}_5\text{OH}25.3 g of C2H5OH
21.6 g of H2O21.6\text{ g of }\text{H}_2\text{O}21.6 g of H2O
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.