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21 November, 21:12

If a sample of this compound contains 6.4*1022 sodium ions, how many sulfide ions does it contain?

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  1. 21 November, 21:14
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    The ionic compound formed by sodium and sulfur is Na2S, whose name is sodium sulfide.

    The chemical formula tells you the ratio between the two elements is 2Na/1S or 1S/2Na

    So, if you have 6.4 * 10^22 sodium ions, you will have

    6.4 * 10^22 Na * 1S / 2Na = 3.2 * 10^22 S.

    Answer: the compound contains 3.2 * 10^22 sulfide ions.
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