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Thread: Question for empirical formula

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    Question for empirical formula

    hi everyone

    can someone help me with this question

    1.0 kg of a sample of iron oxide was decomposed to produce 700g of iron

    what is the empirical formula of this iron oxide?

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    Cadet
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    Re: Question for empirical formula

    Iron = 700g
    Oxygen = 300g

    mol of Iron =700/55.85 = 12.5mol
    mol of oxygen = 300/16 = 18.75mol

    Using ratios

    12.5:18.75
    12.5/12.5:18.75/12.5
    1:3/2
    2:3

    Therefore the empirical formula is Fe2O3
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    Re: Question for empirical formula

    thank you so much <3

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