During an investigation, a student compares 0.250 mol of methane, CH₄, with 0.250 mol of ammonia, NH₃.
The student concludes:
“Both samples contain the same total number of atoms because their amounts in moles are equal.”
Evaluate the student's conclusion.
134 exam-style questions on OCR GCSE Chemistry 3.1 Introducing chemical reactions, covering 3.1.1 Writing formulae and balanced chemical equations, 3.1.2 Formulae of compounds from ions, and state symbols, 3.1.3 Conservation of mass and observed changes in mass, 3.1.4 Half equations and balanced ionic equations, 3.1.5 The mole and the Avogadro constant, and 3.1.6 Stoichiometry, limiting reactants and reacting masses. Each one has a worked solution and a mark scheme showing where the marks go.