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2 năm trước
Cho 10,2 g hỗn hợp 2 kim loại A, B có hóa trị II và III vào dung dịch HCl dư, sau phản ứng thu được 11,2 lit H2 (đktc). Xác định kim loại A, B biết rằng nA= nB và MB < MA < 1,5 MB.
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