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4 December, 00:09

Calculation of Percent Composition

Analysis of a 12.04-g sample of a liquid compound composed of carbon, hydrogen, and nitrogen showed it to contain 7.34 g C, 1.85 g H, and 2.85 g N. What is the percent composition of this compound?

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  1. 4 December, 00:36
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    C: 61.0%, H: 15.3%, N: 23.7%

    Explanation:

    We can calculate the percent by mass of each element using the following expression.

    %Element = (mass of the element/mass of the compound) * 100%

    Carbon

    %C = (7.34 g/12.04 g) * 100% = 61.0%

    Hydrogen

    %H = (1.85 g/12.04 g) * 100% = 15.3%

    Nitrogen

    %N = (2.85 g/12.04 g) * 100% = 23.7%

    The percent composition of this compound is C: 61.0%, H: 15.3%, N: 23.7%.
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