Chemistry, 17.10.2021 06:10 hardwick744

nguyên tố R thuộc nhóm VIA trong bản tuần hoàn. TRong hợp chất của R với hidro có 5, 882% hidro về khối lượng. R là nguyên tố nào?

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nguyên tố R thuộc nhóm VIA trong bản tuần hoàn. TRong hợp chất của R với hidro có 5, 882% hidro về k...

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