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

    Jan 14, 2011, 06:15 PM
    Help on high school chemistry problems!
    How much copper is in 4.827mol of copper(II)
    Chloride?
    Answer in units of g.


    A sample of an ore of iron, hematite, is 52%
    Fe2O3. How much iron is there in 8 kilograms
    Of the ore?
    Answer in units of g.

    I've tried both several times and cannot get them!! Please help!
    DrBob1's Avatar
    DrBob1 Posts: 425, Reputation: 86
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    #2

    Jan 14, 2011, 07:40 PM
    How many grams of Cu are in one mole of CuO? There will be 4.827 times as much in 4.827 moles of CuO!
    If hematite is 52% Fe2O3, how many grams of Fe2O3 are in 8kg of hematite? How many moles is that? Keep on like in the first part.
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