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    kelleya's Avatar
    kelleya Posts: 4, Reputation: 1
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    #1

    Sep 27, 2009, 01:47 PM
    Main 2 elements in seawater?
    What are the main two elements in seawater?
    a.) calcium and iron
    B.) sodium and chlorine
    C.) silicon and magnesium
    Sylvanta Sybil's Avatar
    Sylvanta Sybil Posts: 74, Reputation: 5
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    #2

    Sep 27, 2009, 11:50 PM

    B.) sodium and chlorine.
    asking's Avatar
    asking Posts: 2,673, Reputation: 660
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    #3

    Oct 8, 2009, 10:36 PM

    Hydrogen and oxygen, hands down.

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