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14 October, 16:12

Phentyfloroform contains 57.54% C, 3.45% H, and 39.01% F. What is its empirical formula?

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  1. 14 October, 19:26
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    Empirical formula is C₇H₅F₃

    Explanation:

    Given dа ta:

    Percentage of hydrogen = 3.45%

    Percentage of carbon = 57.54%

    Percentage of fluorine = 39.01%

    Empirical formula = ?

    Solution:

    Number of gram atoms of H = 3.45 / 1.01 = 3.42

    Number of gram atoms of F = 39.01 / 18.99 = 2.05

    Number of gram atoms of C = 57.54 / 12.01 = 4.79

    Atomic ratio:

    C : H : F

    4.79/2.05 : 3.42/2.05 : 2.05/2.05

    2.34 : 1.67 : 1

    C : H : F = 3 (2.34 : 1.67 : 1)

    Empirical formula is C₇H₅F₃.
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