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huyentran062002
2 năm trước
Cho 12g hỗn hợp X (Fe,Cu) vào 200g đe H2SO4 loãng , vừa đủ , sau pư thu được 0.4g khí video , chất rắn A và đe B a)Tính m mỗi kim loại trong 12g hỗn hợp X b) tính khối lượng dd B
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