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    boobie1's Avatar
    boobie1 Posts: 2, Reputation: 1
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    #1

    Oct 29, 2009, 09:11 AM
    Moles
    What is the mass of 1.45 moles of Al?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Oct 29, 2009, 09:14 AM

    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?

    Post your answer :)
    boobie1's Avatar
    boobie1 Posts: 2, Reputation: 1
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    #3

    Oct 29, 2009, 11:01 AM

    0.06 is the mass of 1.45 Al.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    Oct 29, 2009, 11:05 AM

    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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