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Old Oct 29, 2009, 09:11 AM
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Moles
What is the mass of 1.45 moles of Al?

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Old Oct 29, 2009, 09:14 AM   #2  
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Aluminium has a relative atomic mass of 27.

So, 1 mole of aluminium has a mass of 27g
2 moles of Aluminium have a mass of (27*2) = 54g

Can you work out the mass of 1.45 moles of Al now?

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Old Oct 29, 2009, 11:01 AM   #3  
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0.06 is the mass of 1.45 Al.
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Old Oct 29, 2009, 11:05 AM   #4  
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1 mole of Al -> 27g
2 moles of Al -> 27 x 2 = 54 g
1.45 moles of Al -> 27 x 1.45 = 39.15 g
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