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Huongquynh2018
2 năm trước
câu 1: hòa tan hết m gam kim loại R cần dùng vừa đủ 200ml dung dịch hcl 1M. thu được 12,7 gam muối RCL2 a) viết phương trình phản ứng b) xác định kim loại m
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