Cho Kẽm vào dung dịch axit sunfuric loãng. Sau một thời gian, Kẽm tan hoàn toàn và người ta thu được 2,24 lít khí Hiđro (ở đktc). a. Viết các phương trình hoá học. b. Tính khối lượng Kẽm đã phản ứng. c. Dẫn toàn bộ lượng khí Hidro thu được ở phản ứng trên đi qua ống thủy tinh chứa 6,4 gam bột Đồng(II) oxit nung nóng. Sau khi phản ứng kết thúc, người ta thu được a gam chất rắn. Tính a.

Rewrite the sentences 1. How much will the holiday cost? Can you let me know the price of the holiday ? 2. Are there any cafes’ near here? Could you tell me if there were any cafes’near here ? 3. Does John like classical music? Do you know ? 4. Where’s the post office? I wonder if you could tell me 5. Why did you do that? Could you tell us ?

1. I think the exam will be very difficult and you are not studying at all. A. you are not going to fail the exam B. you are not passing the exam C. you are not going to pass the exam 2. Get down off that table. It doesn't look very stable at all. A. you are going to stand on the table B. you are going fall off the table C. you are going to fall off the table 3. The lion is chasing the deer and the deer has an injured leg. A. the deer is going to escape B. the lion is going to catch the deer C. the deer is going to catch the lion 4. It is raining very hard and Liam is walking in the street without an umbrella. A. Liam is going to get very wet B. it is going to rain C. Liam is going to forget his umbrella 5. The wind is blowing very hard and one of the big trees in the garden is making strange creaking noises. A. it is going to rain B. the tree is going to creak C. the tree is going to fall down 6. The room is full of dust and John is holding his nose and making a strange expression with his face. A. John is going to clean the room B. John is going sneeze C. John is going to sneeze 7. The Chicago Bulls are winning the basketball match against the Los Angeles Lakers by 98 points to 81. There are only 90 seconds left. A. the LA Lakers going to lose the match B. the Chicago Bulls will winning the match C. the Chicago Bulls are going to win the match 8. It is raining and the sky is very dark. The temperature is falling very quickly and there are gritting lorries out in the town. A. there is going to be bad weather B. it is going to snow C. it is going to cold 9. Molly is an emotional type. She is watching a very sad film and the heroine has just died. Molly is reaching for her tissues. A. Molly is going to cry B. Molly is going to telephone her friend C. Molly is going to watch a film 10. The fishing boat has a hole in its side and the waves are getting higher and higher. A. The fishing boat is going to sink B. The fishing boat going to sink C. The fishing boat is going to the home port

4. Choose the best answer: What ............ he look like? He's...................... * ( tranh ở dưới nhé mọi người )

Natural disasters can be destructive and wreak havoc across large areas. Most natural disasters are caused by weather. Weather disasters can be caused by hurricanes, tornadoes, floods, tsunamis, thunderstorms, wind storms, wildfires, avalanches, and blizzards. Some of the weather disasters can be predicted such as hurricanes and blizzards. The technology is getting better in predicting tornadoes and severe thunderstorms. By getting the data early people can be warned to take shelter or make the necessary preparations. Some natural disasters are caused by volcanoes and earthquakes. Some wildfires are caused by lightning, but some are caused by people. Flooding is the world’s most expensive type of natural disaster because the damage can be so extensive. Earthquakes are the deadliest of all natural disasters. Some kinds of disasters are more common in some places than in others. When people are choosing a place to live they need to consider whether they will live on a fault line for an earthquake or near a river that has a history of flooding. Question 1: Weather is the main cause of natural disasters. A. True B. False Question 2: All of the natural disasters are predictable. A. True B. False Question 3: The costliest disaster is flooding. A. True B. False Question 4: Wildfires cause the most deaths. A. True B. False Question 5: People should find information about a place before deciding where to live to avoid natural disasters. A. True B. False

Bài 1: Thay từ bảo vệ trong câu sau bằng một từ đồng nghĩa với nó: Chúng em bảo vệ môi trường sạch đẹp. - Từ thay thế cho từ bảo vệ là:……………… Bài 2: Tìm đại từ xưng hô trong câu sau: Tôi đã cố gắng học tập thật tốt để cha mẹ vui lòng. - Đại từ là:…………………………….. Bài 3: Tìm cặp quan hệ từ trong câu sau và cho biết chúng biểu thị quan hệ gì ? Nhờ bạn Lan giúp đỡ mà kết quả học tập của Tuấn tiến bộ rất nhiều. - Cặp quan hệ từ:…………………………….. - Biểu thị quan hệ: ……………………………..

lập bảng thống kê nguyên nhân, diễn biến , kết quả và ý nghĩa của cuộc kháng chiến chống Xiêm

Tìm e biết: (e : 0,3 ) x 0,2 = 15,2 e =

Hệ cao nhất của đa thức C(y) = 10y - 2y5 + 15 + 4y4 - y3 là: A.10 B.15 C.2 D.-2

1/Theo em ở lứa tuổi hs có cần sử dụng mỹ phẩm không? Tại sao? 2/ Nếu bản thân em bị mụn do thay đổi nội tiết tố ở tuổi dậy thì vậy em cần phải làm gì ?