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cohainhantuthao
2 năm trước
Bằng phương pháp hóa học phân biệt các dung dịch sau : NaBr , Na2SO4 , KNO3 , Na2CO3 ( lm giúp ạ , không nhìu lí thuyết , dễ hiểu ạ,lập bảng càng tốt, vote5+c ơn)
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