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23 February, 05:45

When 2.50 grams of copper reacts with oxygen?

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  1. 23 February, 08:32
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    Mass oxigen = 2.81 - 2.50 = 0.31 g

    Moles O = 0.31 g / 15.9994 g/mol = 0.0194

    moles Cu = 2.50 g / 63.546 g/mol = 0.0393

    we divide by the smallest number

    0.0194 / 0.0194 = 1 = > O

    0.0393 / 0.0194 = 2 = > Cu

    the formula is Cu2O (Copper (I) oxide)

    Ya got this
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