Có một hỗn hợp bột gồm Fe và Al biết rằng hỗn hợp này tác dụng vừa đủ với 8,736 l khí Cl2(đktc). Hỗn Hợp này tác dụng với HCl dư và giải phóng 8,064 l khí H2(đktc). a,Viết PTHH b,Xác định %m mỗi kim loại trong hỗn hợp đầu

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