Calculations

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  • Created by: Katie
  • Created on: 23-04-13 11:36
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  • Calculations
    • Relative Atomic mass & formula mass
      • ATOMIC MASS (Ar)- how heavy atoms are- being the mass number of an element (found in the periodic table). e.g. Helium's Ar = 4.
      • FORMULA MASS (Mr)- how heavy compounds are- which is basically all the relative atomic masses added together. e.g. MgCl2= 24+(35.5)= 95.
    • Untitled
  • No. of moles= Mass(g) of the element ÷ Mr
    • Moles
      • ONE MOLE of a substance is EQUAL to its Mr in GRAMS
        • No. of moles= Mass(g) of the element ÷ Mr
          • Moles
            • ONE MOLE of a substance is EQUAL to its Mr in GRAMS
              • The relative formula mass of a substance in grams is known as one mole of the substance
            • e.g. Iron has an Mr of 56. So one mole of iron weighs exactly 56g.
              • The relative formula mass of a substance in grams is known as one mole of the substance
            • Calculations
              • Relative Atomic mass & formula mass
                • ATOMIC MASS (Ar)- how heavy atoms are- being the mass number of an element (found in the periodic table). e.g. Helium's Ar = 4.
                • FORMULA MASS (Mr)- how heavy compounds are- which is basically all the relative atomic masses added together. e.g. MgCl2= 24+(35.5)= 95.
              • Untitled
      • e.g. Iron has an Mr of 56. So one mole of iron weighs exactly 56g.

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