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CGB IGCSE Chemistry
Mole Worksheet
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Mole Worksheet

 

  1. Find the mass, in grams, of the following:
    1. 1 mole copper atoms
    2. 1.5 moles of sulphur atoms
    3. 2 moles of magnesium atoms
    4. 5 moles of carbon atoms
    5. 10 moles of chlorine atoms
    6. 0.1 moles of nitrogen atoms
    7. 0.2 moles of neon atoms
    8. 0.6 moles of hydrogen atoms
    9. 1.5 moles of oxygen atoms

 

  1. Find the mass, in grams, of the following:
    1. 1 mole of hydrogen molecules, H2
    2. 2 moles of hydrogen molecules, H2
    3. 1 mole of oxygen molecules, O2
    4. 0.5 moles of chlorine molecules, Cl2
    5. 2 moles of phosphorus molecules, P4
    6. 4 moles of sulphur molecules, S8

 

  1. Find how many moles of atoms there are, in:
    1. 32 g of sulphur
    2. 48 g of magnesium
    3. 23 g of sodium
    4. 14 g of lithium
    5. 1.4 g of lithium
    6. 3.1 g of phosphorus
    7. 6.4 g of oxygen
    8. 5.4 g of aluminum
    9. 2 g of hydrogen
    10. 0.6 g of carbon

 

  1. For each pair, decide which of the two substances contains the greater number of atoms.  Remember there are 6.02 x 1023 atoms in a mole.
    1. 80 g of sulphur or 80 g of calcium
    2. 80 g of sulphur  or 80 g of oxygen
    3. 1 mole of sulphur atoms or 8 moles of chlorine atoms
    4. 1 mole of sulphur atoms or 1 mole of oxygen atoms
    5. 4 moles of sulphur atoms or mole of sulphur molecules (S8)

 

  1. What is the mass, in g, of:
    1. 1 mole of water, H2O
    2. 5 moles of water
    3. 1 mole of anhydrous copper(II)sulphate, CuSO4
    4. 1 mole of hydrated copper(II)sulphate, CuSO45H2O
    5. 2 moles of ammonia, NH3
    6. 0.5 moles of ammonium carbonate (NH4)2CO3
    7. 0.3 moles of calcium carbonate CaCO3
    8. 1/5 mole of magnesium oxide, MgO
    9. 0.1 moles of sodium thiosulphate, Na2S2O3
    10. 2 moles of iron(III)chloride, FeCl3

 

  1. 1 mole of sodium carbonate (Na2CO3) contains 2 moles of sodium atoms, 1 mole of carbon atoms and 3 moles of oxygen atoms.  In the same way write down the number of moles of each atom present in 1 mole of:
    1. lead oxide, Pb3O4
    2. ammonium nitrate, NH4NO3
    3. calcium hydroxide, Ca(OH)2
    4. dinitrogen tetroxide, N2O4
    5. ethanol, C2H5OH
    6. ethanoic acid, CH3COOH
    7. hydrated iron(II)sulphate, FeSO47H2O
    8. iron(III) ammonium sulphate, NH4Fe(SO4)3

 

  1. The formula of calcium oxide is CaO.  The Ar are : Ca = 40, O= 16.  Complete the following statements:
    1. 1 mole of Ca (_______g) and 1 mole of O (______g) combine to form ______  mole of CaO (______g).
    2. 4.0 g of calcium and ______g of oxygen combine to form _______g of calcium oxide.
    3. When 0.4 g of calcium reacts with oxygen, the increase in mass is ______g.
    4. If 6 moles of CaO were decomposed to calcium and oxygen, ______moles of calcium and ________moles of O2 would be obtained.
    5. The percentage by mass of calcium in calcium oxide is ________%.