Hoàn thành các PTHH sau và cho biết loại phản ứng? a. P + ……….-------> P2O5 b. Al + O2 -------> …….. c. Zn + ………. ------> ZnCl2 + H2 d. Fe + ………. ------> FeCl2 + H2 e. H2O ------> ……. + ……….. f. H2 + O2 -------> H2O g. Na + …….-------> NaOH + H2 h. KMnO4 -------> K2MnO4 + MnO2 + O2 l. KClO3 -------> KCl + O2

1. Cho 2,4 gam magie tác dụng vừa đủ với axit clohidric (HCl). Tính thể tích khí H2 ở đktc. 2. Cho 5,6 gam sắt tác dụng vừa đủ với axit sunfuric loãng (H2SO4 loãng). Tính thể tích khí H2 ở đktc.

Câu 33. Một cần cẩu nâng một vật có khối lượng 1800kg lên cao 6m trong thời gian 1 phút. Công suất của cần cẩu là bao nhiêu?

Câu 34. Một con ngựa kéo xe với lực kéo 150N  di chuyển trên quãng đường 1Km với vận tốc trung bình 5m/s.

Tính công mà con ngựa sinh ra trên quãng đường đó?

Tính công suất của con ngựa?

Câu 35. Một máy nâng khi hoạt động thì nâng được 1 vật nặng 70kg lên độ cao 10m trong 60s.

Tính công suất tối thiểu của  máy đã thực hiện trong thời gian nâng vật.

Tìm công suất của máy? Biết hiệu suất của máy là 70%.

Paper makes up about 28 percent of solid trash in landfills and one ton of paper takes (1) ___________ about 3.3 cubic yards of landfill space. Recycling paper and cardboard saves space in landfills for trash (2)

___________ cannot be recycled and saving space in landfills reduces the need to build more landfills. Many communities oppose the building of new landfills in their neighborhoods.

Recycling one ton of paper saves (3) ___________ equivalent to the energy needed to power the average U.S. home for six months and saves about 7,000 gallons of water. Making recycled paper into new paper products saves energy and water (4) ___________ the number of energy-intensive steps and processes that use water are reduced.

1. A. in   B. for   C. up   D. of

2. A. that   B. who   C. where   D. why

3. A. money   B. thing   C. energy   D. people

4. A. although   B. so   C. but   D. because

1. Would you mind opening the door? (Use “Do you mind….?”)

…………………………………………………………………………………………………

2. We do the homework every night. (Change into passive voice)

…………………………………………………………………………………………………

3. She studies English. She can communicate with foreigners. (Use “in order to”)

……………………………………………………………………………………………

4. times/ Every milk bottle /reused/ can be/ /thirty/. (Put the words or phrases in correct order to make the sentences)

……………………………………………………………………………………………

5. Can you show me the way to the bus station? (Do you mind+Ving)

=> Do you mind…………………………………………………………………?

6. It is all right if I take a photo? (Do you mind if I + V)

=> Do you mind if………………………………………………………………?

7. Could you tell me how to study English?

=> Would you mind …………………….........……………………………...?

I.Choose the most suitable words or phrases to fill the blanks

1. I'll come home 8.30 and 9.20.

  A. at   B. in   C. between   D. on

2. Would you mind if I ______________ a photo?

A. take   B. taken   C. took   D. taking

3. The old lamp _______________ in China is five dollars.

A. make   B. made   C. making   D. to make

4. The boy __________________ a book is Ba.

A. read   B. to read   C. reads   D. reading

5. The man _______________ in the garden is my grandfather.

A. is working   B. works   C. worked   D. working

II. Read the passage

A boy was riding a bike when he had an accident. He fell off his bike and hit his head on the road. His head was hurt, it was bleeding. However, he was still conscious. It was an emergency so people called an ambulance in order to take him to hospital. Some people tried to stop the bleeding by using a handkerchief to cover the wound. Then they put pressure on it and held tight. After ten minutes, the ambulance arrived and people took the victim to hospital.

a) Answer: True ( T )or False ( F )

1. A boy was riding a car when he had an accident  _________

2. His head was hurt, it was bleeding  _________

3. Then they didn’t put pressure on it and held tight _________

4. After ten minutes, the ambulance arrived and people took the victim to hospital.___________

b) (Answer the questions)

1. What did the boy happen?

…………………………………………………………………………………………………

2. Was he still conscious?

…………………………………………………………………………………………………

3. How long did the ambulance arrive?

…………………………………………………………………………………………………

Cho kim loại sắt tác dụng với axit HCl thu được sắt (II) clorua và khí H2

a) Tính khối lượng sắt và khối lượng axit biết thể tích hidro bằng 3,36 lít (ở điều kiện tiêu chuẩn).

b) tính khối lượng sắt clorua (FeCl2) tạo thành.

1) I (go)________to school every day.

2) She (listen)______to music every night.

3) My father sometimes (go)_______to work by bus.

4) You always (have) _____lunch at school.

5) Where is your mother? She (be)______in the kitchen.

6) We (be) _________pupils now.

7) They often (walk) ________to school.

8) He (be) _______a teacher.

9) My mother often (go) ________to Cao Lanh City.

10) He sometimes (get) _________up late.

11) Lan always (have) ________lunch at school.

12) I (teach) ________here for 8 years.

13) Hoa (go) ______to HaNoi last summer.

14) Nam just (go) ______out.

15) I already (see) ___________that film.

16) You (not do) ______your homework yet.

17) Nga (walk) ________to school every day.

18) I (know) _______her along time ago.

19) My father (work) ________in that factory since 2000.

20) Nam (play) ______chess yesterday.