Hoàn thành các phương trình sau 

1. HCOOC₂H₅ + NaOH

2. CH₃COOC₂H₅ + NaOH

3. CH₃CH₂COOCH₃ + NaOH

4. CH₃COOCH₂CH₃ + NaOH

5. CH₂=CH-COOCH₃ + NaOH

6. CH₃COOCH=CH₂ + NaOH

7. CH₃COOCH₂C₆H₅ + NaOH

8. C₆H₅COOCH₃ + NaOH

9. CH₃COOC₆H₅ + NaOH

10. CH₃COOCH₂-CH₂-CH₃ + NaOH

Đốt cháy hoàn toàn 7,4 gam este X, thu được 6,72 lít CO₂ (ở đktc) và 5,4 gam H₂O. Tìm CTPT của X.

Đốt cháy hoàn toàn 7,4g một este X thu được 13,2g CO₂ và 5,4g H₂O. Biết rằng X tham gia phản ứng tráng gương. Xác định CTCT và gọi tên X.

Đốt cháy hoàn toàn 4 gam 1 este đơn chức thu được 4,48 lít CO₂ (đktc) và 2,88 gam nước. Tìm CTPT của este.

Bài 1: Hoàn thành các phương trình sau và gọi tên các chất

1. HCOOH + CH₃OH 

2. CH₃COOH + CH₃-CH₂OH

3. CH₂=CH-COOH +  CH₃-OH

4. CH₃-COOH + C₂H₅-OH

5. CH­₃-CH₂-COOH + CH₃OH

6. HCOOH + CH₃-CH₂-CH₂-OH

7. CH₃-COOH + CH≡CH

8. CH₃-COOH + C₆H₅-CH₂OH

9. CH­₃-CH₂-COOH + CH₃OH

10. CH₂ = CH-COOH +  C₂H₅OH

sửa lỗi sai

1. it was the day like any other and Martin was doing his normal round as a safeguard

2. in constrast to my brother is hardworking, I am quite a lazy boy

3.i went into the city center today because i need to get my phone repaired

4 it was so short-sighted for Mai to leave school

5. The moment i was seeing him, I realized i had meet him somewhere before

6. i was having a black cat three years ago but now it is no longer with me

1.“If you don’t stop talking, I’ll give you a detention,” said Mr Medway to his class

Mr Medway threatened ___

2. ”Don’t swim too far out to sea as the currents are quite strong,” said Jo to Tom.

 Jo warned _

3. “I think you should go to that restaurant. It’s really good,” said Ben to Lee.

Ben recommended __

4.. “Don’t forget to write thank-you letters for your presents,”said Mandy to her daughter. 

Mandy reminded __

5.“I won’t tell anyone what you’ve told me,” said Fred. 

Fred promised _

6.We pay Linda to wash our car every Sunday. (have)

We have _

7.. I wish you would decide what programme you want to watch! (mind) 

I wish you would _

8.Cheating in exams is not acceptable under any circumstances. 

Under no circumstances _

9.After Peter’s visits, we would all say goodbye to him at the station. (see) 

After Peter’s visits, we would all ___

10. The holiday was so expensive that we could only afford one week. 

It was _