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24 April, 09:20

A mixture of sand (SiO2), sodium chloride (NaCl), and iron (Fe) filings had a mass of 30.126 g. After analysis this mixture was found to contain 15.976 g of sand and 3.455 g of iron. What is the mass percent (%) of sodium chloride in the sample?

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  1. 24 April, 09:37
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    35.5 % NaCl

    Explanation:

    Total mass of mixture = 30.126 g

    Mass of sand = 15.976 g

    Mass of iron = 3.455 g

    Mass of NaCl = ? → Total mass - 15.976 g - 3.455 g = 10.695 g

    % mass of NaCl in the sample → (Mass of NaCl / Total mass). 100

    (10.695 g / 30.126 g). 100 = 35.5 %
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