Hấp thu 6,72 lit khí SO2 (đktc) vào 600 ml dung dịch chứa hỗn hợp KOH 0,4 M và Ba(OH)2 0,2 M thu được m gam kết tủa và dung dịch X. Cô cạn dung dịch X, thu được a gam chất rắn khan. Tính giá trị của m và a.

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VI. Last Sunday, Lan didn’t go to school, but she went to her friend’s birthday party. She got up early in the morning, went to the shop, and bought some gifts and flowers. Then, she went to her friend’s house. At the party, she ate a lot of cakes, and drank soft drink. She danced beautifully, sang many songs, and told a lot of interesting stories. All her friends were there, too. They played many games such as hide-and-seek, skipping rope and cards. They were very happy and enjoyed themselves a lot. Finally, the party came to an end. They said goodbye to ech other and went home late in the evening. 1. Where did Lan go last Sunday? …………………………………………………………………………….. 2. What did she buy for her friend? …………………………………………………………………………….. 3. What did she do at the party? …………………………………………………………………………….. 4. Did they enjoy themselves a lot? …………………………………………………………………………….. 5. When did they go home? …………………………………………………………………………….. VII. My name is Hung. I live in Quang Nam. I have got two penfriends, Phong and Linh. Phong lives in Ha Noi and Linh lives in Ho Chi Minh city. It is very interesting that the weather in our areas is not the same. There are only two seasons in Quang Nam and Ho Chi Minh city: the rainy season and the dry season. But there are four seasons in Ha Noi: spring, summer, autumn and winter. Last week, it was wet and cool in Quang Nam, but it was very cold and dry in Ha Noi and it was hot and dry in Ho Chi Minh city. 1. Where does Hung live? …………………………………………………………………………….. 2. How many penfriends does he have? …………………………………………………………………………….. 3. How many seasons are there in Ho Chi Minh city? …………………………………………………………………………….. 4. What are the four seasons of Ha Noi? …………………………………………………………………………….. 5. What was the weather like in Ha Noi last week? …………………………………………………………………………......