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by sean on March 7th, 2010

sean

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what is emperical formula of compund containing 20.11 percent hydrogen and 78.89 percent carbon

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  • by engineer is Terminator on April 2nd, 2010

    engineer is Terminator

    The question is incomplete.Empirical formulas are calculated with regard to percentage of composition, but when you define 20.11 percentage and the rest should be 79.89 instead of 78.89%, but the question is % by what? By mass or by composition?

    20:11% of Hydrogen = 20 moles oh H

    79.89 of Carbon = 79.89/12 =6.6575 moles of C

    So the ratio comes dowm to 3:1
    Hence, the Empirical formula is CH3

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