01 a. Having the same percentage composition (that is, having the same elements united in the same proportion by weight), but different molecular…
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Having the same percentage composition (that is, having the same elements united in the same proportion by weight), but different molecular weights; -- often used with with; thus, cyanic acid (CNOH), fulminic acid (C2N2O2H2), and cyanuric acid (C3N3O3H3), are polymeric with each other.(Chem.)