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letinh
2 năm trước
Người ta đốt sắt trong bình chứa oxi thì thu được oxit sắt từ (Fe3O4) a) Nếu thu được 23,2g oxit sắt từ thì phải dùng ao nhiêu ga sắt? b)Tính khối lg KClO3 cần dùng để điều chế thể tích oxi nói trê. Biết thể tích đo ở đktc và lg oxi hao hụt là 10% chi tiết rõ ràng đầy đủ số mol giúp mình nha
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