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1 February, 08:31

Calculate in witch material - sodium or zinc sulphide is the highest percentage by mass of sulfur

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  1. 1 February, 08:49
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    sodium sulphide.

    Explanation:

    First, let us obtain the percentage of sulphur in both compounds. This is illustrated below:

    For sodium sulphide (Na₂S):

    Molar Mass of Na₂S = (23x2) + 32 = 46 + 32 = 78g/mol

    Percentage of sulphur in Na₂S is given by:

    32/78 x 100 = 41%

    For zinc sulphide (ZnS):

    Molar Mass of ZnS = 65.4 + 32 = 97.4g/mol

    Percentage of sulphur in ZnS is given by:

    32/97.4 x 100 = 33%

    From the results obtained sulphur has the highest percentage by mass in sodium sulphide.
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