Hoa ve kim loai–vào giải giúp?
De m g hh bot Al, Fe ngoai khong khi sau 1 thoi gian thu dk 23,7 g hh Y gom 6 chat ran.hoan tan hh Y bang dd HCl vua du thu dk dd Z va 0,896 lit khi. Nho tutu dd NaOh vao dd Z cj oden khi luong ket tua bat dau tan thj dung lai, loc bo ket tua lay fan dd. Co can dd thu dk 45,63g muoi khan. Tim m
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