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2 năm trước
Khi hấp thụ hết V lít CO2 (đktc) vào 200 ml dung dịch Ba(OH)2 0,5M thu được m gam kết tủa. Nếu dẫn thêm 0,672 lít CO2 (đktc) vào hỗn hợp sản phẩm ở trên, chờ phản ứng xong thì thấy không có khí thoát ra, lọc kết tủa và cân được 1,97 gam chất rắn. Tính V và m? hmu giúp mk với mk sắp phải nộp cho cô r ;(
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