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23 November, 09:38

Select all the correct answers.

A sample of an unknown compound has a percent composition of 52.14% carbon, 13.13% hydrogen, and 34.73% oxygen. Which compounds could the sample be?

CH3CH3CH2O2

C2H5OH

C4H10O2

C4H12O2

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Answers (1)
  1. 23 November, 09:40
    0
    C2H5OH

    Explanation:

    To know the compound used as the sample, let us calculate the empirical formula for the compound. This is illustrated below:

    Data obtained from the question include:

    Carbon (C) = 52.14%

    Hydrogen (H) = 13.13%

    Oxygen (O) = 34.73%

    Next, divide the above by their individual molar mass

    C = 52.14/12 = 4.345

    H = 13.13/1 = 13.13

    O = 34.73/16 = 2.171

    Next, divide the above by the smallest number.

    C = 4.345/2.171 = 2

    H = 13.13/2.171 = 6

    O = 2.171/2.171 = 1

    Therefore, empirical formula for the compound is C2H6O

    Now we can re-arrage C2H6O to become C2H5OH.

    Therefore, the compound used as the sample is C2H5OH
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