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18 May, 02:11

a 9.56g sample of CuS is found to contain 6.35g of copper. What is the percent by mass of sulfur in this compound? Report your answer to the hundredths place

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  1. 18 May, 05:19
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    33.58%

    Explanation:

    Data obtained from the question include:

    Mass of CuS = 9.56g

    Mass of Cu = 6.35g

    Mass of S = Mass of CuS - Mass and Cu

    Mass of S = 9.56 - 6.35

    Mass of S = 3.21g

    The percentage by mass of sulphur in CuS is given by:

    Mass of S/mass of CuS x 100

    Percentage by mass of S = 3.21/9.56 x 100 = 33.58%
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