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thanhmocdongtrac
2 năm trước
một hỗn hợp gồm canxi oxit và bari oxit có khối lượng là 20,9 gam tác dụng hết với Co2 tạo thành 29,7 gam hỗn hợp 2 muối Caco3 và Baco3 tính thể tích khí Co2 đã tham gia phản ứng ( đktc ) và khối lượng mỗi oxit trong kí hiệu ban đầu
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