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Hana2407
2 năm trước
trong phòng thí nghiệm ,người ta điều chế khí oxi bằng cách nung KClO3 và có MnO2 làm chất súc tác a.Viết pthh b. tính thể tích khí oxi thu được khi nung 36,75 gamKClO3. c. Với thể tích khí oxi ở trên cho tác dụng với 5,6 gam sắt . Sau phản ứng chất nào dư?khối lượng dư là bao nhiêu
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