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    brando23's Avatar
    brando23 Posts: 1, Reputation: 1
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    #1

    Oct 10, 2008, 04:59 PM
    Calculating the amount of atoms
    How many atoms of oxygen are a formula unit of the mineral leadhillite Pb4SO4(CO3)2(OH)2?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Oct 11, 2008, 03:21 AM

    Count 'em!

    1st in SO4
    2nd in (CO3)2
    Then in (OH)2

    Add them up. The number outside the brakets apply to alll that are in the brakets.

    Hope it helped, rate my answer, if you don't mind:)
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