Chỉ ra từ tượng thanh và nêu công dụng ccuar nó trong 2 câu thơ sau:

"Chưa cần rửa, phì phèo châm điếu thuốc

Nhìn nhau mặt lấm cười ha ha"

Hòa tan hoàn toàn 8g một oxit kim loại R cần dùng dung dịch chứa 0,3 mol HCl. Xác định kim loại R và oxit nói trên

Combine the two sentences into a new one using the given words in brackets. Do not change the given words in any ways.

1. We bought some trees. Our neighbour told us they were on sale. (THAT)

2. Hurry up! You will miss the bus. (UNLESS)

3. We all respect him. He is an honest man. (BECAUSE)

4. Jane is quite warm and friendly. Her sister is quite warm and friendly. (BOTH)

5. He had gone. I didn't have a chance to thank him. (BEFORE)

6. The exam was long and difficult. I was completely exhausted at the end. (SUCH)

7. I'll post the CD today. You will get it by the weekend. (SO THAT)

8. I'm going to buy a camera with the money. Otherwise, I'm going to buy a DVD player. (EITHER)

Giúp với ạ! Mình tick cho!

Rewrite:

1. I'd prefer you not to smoke in my home. (RATHER)

- I...

2. I think i need to drink less coffee and take tea instead. (CUT)

- I think i need to...

3. We had an argument and i decided not to call her any more. (STOPPED)

- We had...

4. I suggest that you finish your test within the time allowed. (SHOULD)

- You...

5. He said that he would help me with my project. (PROMISED)

- He...

6. There is no point in waiting any longer because he is not going to come. (USE)

- It...

7. In order for you to pass the exam, you will need to achieve a score of 160. (SO)

- You will...

8. There is no way I'm helping you after what you did to me. (INTENTION)

- I have no...

9. This summer is being much hotter than last year. (HOT)

- Last summer...

10. A technician fixed my laptop for me. (HAD)

- I...

Rewrite:

1. When i was little, i would play football every weekend. (USED)

- I ...

2. I have to take care of my little brother while my parents are away. (AFTER)

- I have to ...

3. Psychology was very interesting to me. (IN)

- I ...

4. Many teenagers like social networking sites such as Facebooj or Twitter. ( POPULAR)

- Facebook and Twitter ...

5. Jane went to bed early so thatj she would be fresh in the moring. (ORDER)

- Jane went ...

6. I think she found your story very amusing. (AMUSED)

- I think ...

7. It's a pity I can't stay two days more. (ONLY)

- If ...

8. This is the nicest car I've ever seen (HAVE)

- I ...

9. It will be better if you get up at 7a.m. tomorrow. (SOONER)

- I ...

10. If you heard him speak, you'd think he is an expert. (IF)

- He spoke ...

CÁC BẠN GIÚP MÌNH VỚI, MAI MÌNH NỘP RỒI Ạ! Mình tick cho!

Nhiệt phân hoàn toàn m gam hỗn hợp muối KNO3 và Fe(NO3)2 thu được 12.32 lít hỗn hợp khí (đktc) có tỉ khối so với H2 là 232/11. Giá trị của m là?

Hòa tan hoàn toàn 8,8 gam hợp kim Mg - Cu bằng axit HNO3, sau phản ứng thu được 4,48 lít hỗn hợp khí B gồm NO và NO2 (ở đktc, không còn sản phẩm khử khác). Biết tỉ khối của B so với hidro bằng 19. Thành phần % theo khối lượng của Mg trong hợp kim là

Cho 15g hh X gồm Al, Mg, Cu tác dụng hết với dd HNO3 loãng nóng thu được 58,4 gam hh muối nitrat của các kim loại . mặt khác, oxi hóa hoàn toàn 15 gam hh X bởi oxi thu được m gam hh 3 oxit. Tính m?