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    sarah1004's Avatar
    sarah1004 Posts: 107, Reputation: 1
    Junior Member
     
    #1

    Oct 26, 2009, 04:36 PM
    write all possible mole ratios.
    2Al2O3=4Al+3O2

    So,

    could be like these ratios?

    2mol Al2O3/4mol Al
    and
    2mol Al2O3/3mol O2
    and
    etc...
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
    Ultra Member
     
    #2

    Oct 26, 2009, 04:51 PM

    Usually, we write equations that will actually occur, like



    So, 4 atoms or moles of aluminum will react with 3 moles of oxygen to produce 2 moles of aluminum oxide.

    Now, I'm not sure what "Write all possible mole ratios." means so I don't think I can help you there.
    sarah1004's Avatar
    sarah1004 Posts: 107, Reputation: 1
    Junior Member
     
    #3

    Oct 26, 2009, 04:54 PM


    That's why what i was confusing.
    it says

    following chemical equations write all possible mole ratios.

    so..

    Don't u have any idea with it?

    anyway THanks
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
    Ultra Member
     
    #4

    Oct 26, 2009, 05:05 PM

    I think they mean Al/O = 2/3, 4/6, 6/9, etc.

    It might be possible that the formula for aluminum oxide is

    .

    There are other methods to determine the exact formula of some molecule. In many inorganic materials, the lattice is so extensive, that it's really not possible to say what the true "molecule" is, so they just use the simplest molecular formula.

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