imagine that your American pen friend is coming to viet nam and will spend a day in nghe an. Nghe An. Write an email to give him/her advice on the places of interest they should go and the things they can do there

Viết công thức tính: độ tan, nồng độ %, nồng độ mol và giải thích các đại lượng trong công thức.

Câu 1:Đốt cháy hoán toàn 12,4 g photpho trong bình đựng khí oxi.

a. Tính khối lượng điphotphopentaoxit tạo thành sau phản ứng.

b. Tính thể tích khí oxi tham gia phản ứng (đktc)

c. Tính thể tích không khí cần dùng để đốt cháy hết lượng photpho ở trên (coi oxi chiếm 1/5 thể tích không khí)

REPORTED SPEECH STATEMENT

1       “ I haven’t meet my parents for years.”, he says

2       “ I don’t know how much it cost.”, he tells her

3       “I will come next year.”, he tell me

4.“ I’ll help my mum with housework this weekend” He said

5.“We shall overcome this difficulty”, they said

6.“ My father is a doctor here”, my friend said

7.“I am going on holiday tomorrow”, the boy said to his neighbor.

8.“ You will have to finish all these exercises before next week”, the teacher said to his students

9.“I came back here early yesterday,” she said.

10.“ I’ve broken the vase,” she said  

Rewrite the following sentences using conditional sentences.

1. She doesn’t see a fly in her cup of tea, so she drinks it.

→ If she …

2. I'm not you, but I think you should recycle these plastic carrier bags.

→ If I …

3.He is hungry. He is thinking of a hamburger.

→ If he …

4. She has a bad voice but she still wants to be a singer.

→ If she …

5. Buy me an ice cream. Then I’ll take you to school.

→ If you …

6. He is eating so much. He is getting fatter.

→ If he …

7. Flowers have to get enough sunshine to live.

→ If flowers …

8. I must finish my homework first. Then I’ll come to the cinema with you.

→ If I …

4. The students will discuss the problem of natural disasters tomorrow.

5. A volcanic eruption completely wiped out that island in the past.

6. Typhoonsdestroy more than 500 buildings and houses every year. 

7. The fire fightersput out the fire 2 minutes ago.

8. Volcanic eruptions often attack Japan.

4. The students will discuss the problem of natural disasters tomorrow. → ………………………………………………………………………………………………… 5. A volcanic eruption completely wiped out that island in the past.

→…………………………………………………………………………………………………6. Typhoonsdestroy more than 500 buildings and houses every year.

→……………………………………………………………………………………………

7. The fire fightersput out the fire 2 minutes ago.

→ ………………………………………………………………………………………………

8. Volcanic eruptions often attack Japan.

→……………………………………………………………………………………………