Amount of substance

• What is the Avogadro constant?


  The number of particles, atoms or ions in one mole of a substance
• What is percentage yield?


  The % of a product produced by a reaction, compared to a theoretical maximum
• How would you calculate percentage yield?


  Mass of useful product/expected mass of useful product
• What can the percentage yield of a practical be used to investigate?


  The efficiency of practical techniques
• What is atom economy?


  % of amount of reactants made into a useful product
• How would you calculate atom economy?


  Mr of atoms of useful product/Mr of atoms of reactants
• What can the atom economy of a reaction be used to investigate?


  The efficiency of using a specific reaction to produce a product
• What is the ideal gas equation?


  PV=nRT
• What is empirical formula?


  The simplest whole number ratio of atoms of each element in a compound
• What is molecular formula?


  The actual number of atoms of each element in a molecule