Express the composition of each of the following compounds as the mass percents of its elements...?

59) Express the composition of each of the following compounds as the mass percents of its elements.

a) formaldehyde, CH2O
b) glucose, C6H12O6
c) acetic acid, HC2H3O2

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  1. Example: b) glucose.
    a. determine the molecular mass of the compound: 6*12+12*1+6*16= 180
    Percent of C= 6*12/180 x 100
    percent of H= 12*1/180 x 100
    percent of O= 6*16/180 x 100
    and of course, the percents should add to 100.

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  2. Acetic acid, HC2 H3 O2

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