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thoahachitung
1 năm trước
Cho 1,1 gam hỗn hợp nhôm và sắt tác dụng hết với HCl thu được 0,896 lít khí ở đktc. Tính % khối lượng của nhôm trong hỗn hợp đầu A. 49,09% B. 49% C. 51% D. 50,91%
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