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ChemistryChemistry
26 August, 17:27

Although coal is a complex mixture of substances, its elemental composition can be approximated by the formula C135H96O9NS. Using this chemical formula, calculate the percentage, by mass, of carbon (C) in coal.

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  1. 26 August, 17:45
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    85%

    Explanation:

    Firstly, we will need to calculate the molar mass of the molecule. We simply use the atomic masses of each of the elements. The atomic masses are as follows:

    C = 12

    H = 1

    O = 16

    N = 14

    S = 1

    All units are in a. m. u

    The molecular mass is thus:

    (135 * 12) + (96 * 1) + (16 * 9) + 14 + 32 = 1906g/mol

    The percentage by mass of carbon = (135 * 12) / 1906 * 100% = 85%
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Home » Chemistry » Although coal is a complex mixture of substances, its elemental composition can be approximated by the formula C135H96O9NS. Using this chemical formula, calculate the percentage, by mass, of carbon (C) in coal.
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