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why is the answer c instead of B 9. The name of PbO2 is A) lead dioxide. B) lead(II) oxide. C) lead(IV) oxide. D) plumbum

why is the answer c instead of B

9. The name of PbO2 is A) lead dioxide. B) lead(II) oxide. C) lead(IV) oxide. D) plumbum oxide. E) lead oxygen. Answer: C

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