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phivan111
2 năm trước
X là một muốn tan được trong nước.Cho X vào dd BaCl2 hoặc dd NaOH (không dư) đều thu được kết tủa. Trong số các chất CuSO4, Ca3(PO4)2, Al(NO3)3, ZnSO4, FeCO3 số lượng chất có thể đóng vai trò là X là A. 1 B. 2 C. 3 D. 4
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