Khử 6,72 lít khí hiđro trong oxit sắt từ. a) Tính Khối lượng kim loại sắt tạo nên. b) Dẫn toàn bộ Kim loại sắt sinh ra trên qua dung dịch HCl. Tính khối lượng Hợp chất sinh ra sau phân tử và thể tích khí hiđrô thu được.

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