Cho 8,8 gam hỗn hợp A gồm (Cu và Fe) tác dụng với 200 g dung dịch H2SO4 loãng dư. Sau phản ứng thu được 2,24 lít khí H2 (đktc). Hãy: a. Xác định % khối lượng từng kim loại trong hỗn hợp A ban đầu. b. Tính C% muối thu được sau phản ứng. (Cho Cu = 64; Fe = 56; H = 1; S = 32; O = 16) giúp mình nhanh với ạ mình dg ktra

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