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23-01-2024
Chemistry

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Nếu X là kim loại có hoá trị 2 nếu cho X tác dụng với dung dịch HCl vừa đủ rồi cô cạn thu được 9,5 g muối khan nếu lấy cùng lượng X như trên tác dụng với dung dịch H2so4 loãng vừa đủ cô cạn thu được 12 g muối khan tìm X

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