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14 December, 09:23

A chemist mixes 65.6 g of ethanol with 15.1 g of acetone and 99.6 g of 4-methyl-2-pentanone. Calculate the percent by mass of each component of this solution. Round each of your answers to 3 significant digits

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  1. 14 December, 10:18
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    Ethanol = 36.4%

    Acetone = 8.37%

    4-methyl-2-pentanone = 55.2%

    Explanation:

    Mass of ethanol = 65.6g

    Mass of acetone = 15.1g

    Mass of 4-methyl-2-pentanone = 99.6g

    Total Mass = 65.6 + 15.1 + 99.6 = 180.3g

    % Mass of ethanol = (65.6/180.3) x 100 = 36.4%

    % Mass of acetone = (15.1/180.3) x 100 = 8.37%

    % Mass of 4-methyl-2-pentanone = (99.6/180.3) x 100 = 55.2%
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