cho 0,5 lít đ rượu etylic 30 độ pứ với na dư,sau pứ thu được bao nhiêu lít h2,cho biết d rượu=0,8,d nước =1

từ 36g glucozo lên men rượu thì thu đc bao nhieu lít đ rượu 5,75 độ,biết hiệu suất pứ=80%,d rượu=0,8

tính khối lượng tinh bột dùng để điều chế 50ml rượu 23 độ,biết hiệu suất của quá trình lên men là 80%.D(rượu)=0.8(g/mol)

Dẫn 7,84 lít hỗn hợp khí etilen và metan(đktc)  qua dd Brom dư ,thấy khối lượng tăng lên 4,2 gam . Tính thành phần % thể tích mỗi khí trong hỗn hợp đầu.

trên nhãn 1 chai rượu ghi 45 độ,cho biết ý nghĩa.nếu dùng 98ml rượu trên pha loãng thì được bao nhiêu lít rượu 25 độ

Câu 3. Cho m gam hỗn hợp metan, etilen và CO₂ qua bình đụng dung dịch Br₂ dư thấy khối lượng bình tăng 2,8 g và có 3,36 lít khí thoát ra ở đktc. Nếu đốt m gam hỗn hợp trên thu được 7,2 gam H₂O đktc.

a)      Tìm %V mỗi khí trong hỗn hợp đầu?

b)      Tìm m?

c)      Từ etilen trên có thể điều chế bao nhiêu gam polietilen biết H = 80%?

the government has just built a very wonderful bridge(rewrite,using a relative clause)

VII.Make a defining relative clause from the two sentences.
1. Social media networks are an excellent tool. You can use them to promote your business.
____________________________________________________________________________
2. You can buy the pasta from that Italian shop. It has just opened in the high street.
____________________________________________________________________________
3. I‟ll call the students. I went to London with them last summer.
____________________________________________________________________________
4. That‟s the hotel. We stayed there for our honeymoon.
____________________________________________________________________________
5. I couldn‟t find the man. I‟d taken his case by mistake.
____________________________________________________________________________
6. Jeanny phoned me yesterday. I was in conference with my clients then.
____________________________________________________________________________
7. The tree only grows in the rainforest. This drug is obtained from it.
____________________________________________________________________________
8. People often have very little money to spend on leisure. They have a lot of leisure time.
____________________________________________________________________________
9. His refusal to tell her the truth is the reason. That‟s why she is so angry with him.
____________________________________________________________________________
10. We haven‟t seen the friends for ten years. They are coming to visit us this weekend.
__________________________________________________________________________
 

1. Mr. Dean had a long list of misconducts. He had recently been fired.
____________________________________________________________________________
2. The victims are being identified by the US authorities. Most of them were adults.
____________________________________________________________________________
3. Naxos is my favorite island. I‟ve visited it several times recently.
____________________________________________________________________________
4. The football player doesn‟t want to talk about his future. His contract finishes at the end of the season.
____________________________________________________________________________
5. Between 2000 and 2005 she wrote three novels. None of them were published.
____________________________________________________________________________
6. The village of Baydon has now become part of the town. I lived there as a child.
____________________________________________________________________________
7. The new boss seems to be a very capable woman. I met her yesterday.
____________________________________________________________________________
8. December is a summer month for the southern hemisphere. Christmas is celebrated then.
____________________________________________________________________________
9. Graceland Mansion was opened to the public as a museum on June 7,1982. It was once owned by Elvis
Presley.
____________________________________________________________________________
10. An Austrian naturalist discovered this particular orchid. I worked closely with him in the Eighties.
__________________________________________________________________________