Quantitative Chem

• Actual yield


  The amount of product actually produced by a reaction
• Atom economy


  The measure of the amount of starting materials that end up as useful

  products.
• Avogadro constant


  The number of atoms, molecules or ions in a mole of a given substance.
• Avogadro's law


  Equal amounts in moles of gases occupy the same volume under the same conditions of temperature and pressure.
• Concentration


  ​The amount of substance (e.g. the mass) in a certain volume of a solution.
• Conservation of mass


  The law of conservation of mass states that no atoms are lost or made during a chemical reaction so the mass of the products equals the mass of the reactants.
• Limiting reactant


  The reactant that is completely used up since it limits the amount of products formed.
• Mole


  Chemical amounts are measured in moles. The mole is the unit for amount of substance. The symbol for the unit mole is mol.
• Percentage by mass


  A value representing ​the concentration​ of ​an element​ in ​a compound or a component in a mixture. It is calculated by the mass of a component divided by the total mass of the mixture, multiplied by 100.
• Percentage yield


  The percentage ratio of the actual yield of product from a reaction compared with the theoretical yield.
• Relative formula mass


  The sum of the relative atomic masses of the atoms in the numbers shown in the formula. It is numerically equal to the mass of one mole of a substance in grams.
• Theoretical yield


  ​The maximum amount of product that could be produced from the given reactants, assuming a complete reaction takes place.
• Thermal decomposition


  The reaction that​ occurs when heat is applied to a compound causing it to break down into its different chemical constituents.
• Uncertainty


  ​All measurements have a degree of uncertainty regardless of precision and accuracy. Uncertainty can be due to the limitations of the measuring equipment or due to the skill of the experimenter carrying out the measurements
• Atomic Number


  the number of protons in the nucleus of an atom
• Atomic mass


  Number of protons and neutrons
• Isotope


  Atoms of the same element that have different numbers of neutrons
• Relative formula mass


  The weighted mean mass of a formula unit compared with one-twelfth of the mass of an atom of carbon-12.
• Relative Atomic Mass


  The weighted mean mass of an atom of an element compared with one-twelfth of the mass of an atom of carbon-12.