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How many atoms are present in one molecule of aluminium sulphate

Dear Student,

Please find below the solution to the asked query.

The formula of aluminium sulphate is Al2(SO4)3.
So, there are 2 Al atoms, 3 S atoms and 12 O atoms. Thus, there are a total of 17 atoms in one molecule of aluminium sulphate.

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Akanksha Jain 

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write the formula 
(NH4)2S 

You can see each (NH4)2S has 
2 N atoms 
8 H atoms 
1 S atom 

So moles H atoms = 8 x moles (NH4)2S 
= 52.0 moles H 

1 mole anything = 6.022x10^23 units of that anything 

So number H atoms = moles H atoms x 6.022x10^23 atoms/mol 
= 52.0 x 6.022x10^23 atoms/mol 
= 3.13x10^25 atoms of H
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