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Carbon (1.52%) and Nobelium (98.4783 %)

answ2. Not as written. capital O is oxygen, and capital N is nitrogen. But such a compound probably does not exist.

EDIT: C (carbon) has oxidation number of 4+ or 4- and NO3 (nitrate anion) has oxidation number of 1-, so this compound (CNO3) cannot exist.

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