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Chemistry

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In the experiment 0.500 g of copper reacted with oxygen to give 0.563 g of copper oxide. What is the empirical formula of the oxide expressed as a chemical formula?

  • Chemistry -

    ..........Cu + O2 ==> CuxOy
    I.....0.500g...0.......0
    C..............x.........
    E.....0.500+x..-x.....0.563

    Therefore, g Cu = 0.500
    grams oxygen = 0.0.063

    mols Cu = 0.500/atomic mass Cu = ?
    mols O = 0.063/16 = ?

    Now find the ratio of the mols to each other with the smaller number being 1.00.
    Post your work if you get stuck.

  • Chemistry -

    Sn2O3

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