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28 February, 17:35

Determine the molecular formula of a compound that is 54.5% C, 13.7% H, and 31.8% N. The molar mass is 88.0.

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  1. 28 February, 19:29
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    C : H : N

    54.5/12 : 13.7/1 : 31.8/14

    4.5/2.3 : 13.7/2.3 : 2.3/2.3

    2 : 6 : 1

    this is the ratio for emperical fromula

    C2H6N

    now the emperical formula mass will be

    12x2 + 1x6 + 14x1

    =44

    the value to multiple the emperical formula =

    molar mass/emperical formula mass

    88/44 = 2

    2 (C2H6N)

    = C4H12N2
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