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thuquynhhah
2 năm trước
Cho biết CTHH của hợp chất X với S (II) và hợp chất của nguyên tố Y với H như sau : X2S3 và YH3 Hãy chọn công thức hóa học nào đúng trong các hợp chất của X và Y trong các trường hợp dưới đây: A. X2Y B.XY2 C. XY D.X3Y2 Thanks ạ
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