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danmocchau
2 năm trước
Cho 6,9g nguyên tố nhóm IA tác dụng hoàn toàn với nước tạo ra dung dịch X . Để trung hoà dung dịch X cần 500ml dung dịch HCl 0,6M. Xác định nguyên tố đó
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