Mutliply the mole of oxygen molecules by the ratio to get to the number of mole of aluminium atoms
4/3 X 4 = 16/3 mole of aluminium atoms
No
You must calculate the number ofaluminium atoms not the mass of aluminium atoms.
Multiply the mole of aluminium atoms by avogadros number to get to the number of aluminium atoms required.
16/3 X 
aluminium atoms.
.
You must start with the number of oxygen molecules. You are given 
molecules of oxygen.
No
You can not start with mass you are given
molecules of oxygen.
Divide the number of oxygen molecules
by avogadros number.
The mole of oxygen molecules is 4.
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Stoichiometry exercise Number to number |
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Aluminium is ignited in the presence of oxygen to form aluminium oxide according to the equation on the right. How many aluminium atoms are required to react with 2.4 X 1024 oxygen molecules? Do you need help? If Yes click once on the equation on the right to display the help diagram. Click twice to hide the help diagram. Click on the squares in the help diagram for more information. |
O =16, Al =27 |
