Quantitative chemistry 3

• What is the % mass of element?


  relative atomic mass of element/ relative formula of compound x 100
• What is 1 mole?

  Avogadro's number= 6.02x10^23
• Moles formula?


  Moles = grams/ RAMS ie relative atomic/formula mass
• Concentration formula?


  Conc = moles/ volume (dm^3)
• Converting volume of water


  cm^3 (or ml) -> dm^3 divide 1000
• Percentage yield formula:


  total mass of products/ total mass of reactants x 100
• What does percentage yield tell you?

  what mass of product is made in a reaction compared to the theoretical mass that could have been created.
• What is atom economy?

  tells us how much of a desired product can be made in a reaction compared to the total mass of reactants (use RAMS)
• Atom economy formula:


  RAM of products/ total RAM of reactants x 100