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dinhduy1456
2 năm trước
Cho 6,72 lít khí H2 (đktc) tác dụng vừa đủ với Fe2 O3 đun nóng, giả sử phản ứng chỉ tạo thành kim loại. Khối lượng Fe tạo thành sau phản ứng là A: 16,8 (g). B: 11,2 (g). C: 5,6 (g). D: 22,4 (g).
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