X là một este no đơn chức, có tỉ khối hơi so với He là 22. Nếu đem đun 4,4 gam este X với dd NaOH dư, thu được 4,1 gam muối. Công thức cấu tạo thu gọn của X là (He=4, C=12, H=1, O=16)  

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Find a mistake in the four underlined parts of the sentence and correct it:

  Lan is not a good student so she has most of her homework do by her sister.

• Choose the best answer for the following sentence:

  We spent our holiday in Rome, ____________ the capital of Italy.
  
  

• Choose the best answer for the following sentence:

  __________ she is worried about is her daughter's study result.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  If I made a fool of myself in front of my friends, I would have never lived it down.

• Choose the best answer for the following sentence:

  He can't ________ to her any more.
  
  

• Choose the best answer for the following sentence:

  Most of the children come from large and poor families, which ____________ them from having proper schooling.
  
  

• Choose the best answer for the following sentence:

  Mary hopes ___________ to join the private club. She could make important business contact there.
   

• Choose the best answer for the following sentence:

  What ___________ when I saw you yesterday?
   

• Choose the best answer for the following sentence:

  Ms Thuy has twenty-five students, most of ___________ are disabled.
   

• Choose the best answer for the following sentence:

  He _________ in hospital for a week so far.