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22 December, 15:28

Calculate the percent by mass of C in pentaerythritol (C (CH2OH) 4)

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  1. 22 December, 18:52
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    Formula for pentaerythritol = C5H12O4

    mass of pentaerythritol = 5 (12) + 12 (1) + 4 (16)

    = 60 + 12 + 64

    = 138 amu

    mass of C = 12 amu

    % of C in C5H12O4 = [{5 (12) } / 138 ] * 100

    = (60 / 138) * 100 = 43.47%
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