Khử 12,64g hỗn hợp A gồm 2 oxit: Cuo và oxit kim loại M, cần dùng hết 4,032 lít khí Hidro. Sau khi phản ứng kết thúc thu được hỗn hợp chất rắn gồm 2 kim loại. Đem hỗn hợp kim loại này cho tác dụng với dd HCl dư, thu được 1,344 lít khí hidro và còn lại là 6,4g chất rắn không tan. a.Tính khối lượng từng oxit trong hỗn hợp A. b.Tìm kim loại M và oxit của nó.

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