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traitimden20052001
2 năm trước
cho 4g so3 tan hoàn toàn vào 500g h2o thu được dung dịch X. thêm m gam bột kẽm vào dung dịch X thấy thoát ra V lít khí(đktc) và tạo ra dung dịch Y 1/ nếu 2,6≤m≤4,55 thì V có giá trị trong khoảng giới hạn nào? 2/ Tính khối lượng của dung dịch X,Y
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