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22 January, 17:49

Which of the following pairs does not share the same empirical formula?

C2H6 and C4H12 C3H6O3 and C2H4O2 C3H8O and CH2O C2H8 and CH4

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  1. 22 January, 18:02
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    empirical formula is the simplest ratio of whole numbers of components making up a compound

    molecular formula is the actual number of components making up the compound

    there can be many compounds having the same empirical formula

    given options

    1. C₂H₆ and C₄H₁₂

    ratio of C to H in C₂H₆ - 2:6 - - > 1:3

    C₄H₁₂ - 4:12 - - > 1:3

    the simplified ratios for both are same

    therefore both have same empirical formulas

    2. C₃H₆O₃ and C₂H₄O₂

    ratio of C to H to O in C₃H₆O₃ - 3:6:3 - - > 1:2:1

    C₂H₄O₂ - 2:4:2 - - > 1:2:1

    both have same empirical formulas

    3. C₃H₈O and CH₂O

    ratio of C to H to O in C₃H₈O - 3:8:1

    CH₂O - 1:2:1

    the 2 ratios of atoms are different which means they have different empirical formulas

    4. C₂H₈ and CH₄

    ratio of C to H in C₂H₈ - 2:8 - - > 1:4

    CH₄ - - 1:4

    2 ratios are same so same empirical formula

    correct answer is 3. C₃H₈O and CH₂O they do not share the same empirical formula
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