Đốt cháy hoàn toàn 1 mol hỗn hợp X gồm 1 ancol đơn chức và một anđehit đơn chức cần 76,16 lít $O_2$ (đktc) tạo ra 54 gam $H_{2}O$. Tỉ khối hơi của X đối với $H_2$ là :

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  After 6 years studying at Hanoi Medical University, she _________ a flying colors degree.
  
  

• Choose the best answer for the following sentence:

  Ly: “I’m very happy to have a talk to you today.”

  Thao: “_______________ ”
  
  

• Choose the best answer for the following sentence:

  The greatest English scientist Issac Newton, _________ theory of gravitation is well-known throughout the world, was bom in Woolthorpe village, Cambridge, Britain.
  
  

• Choose the word that has the underlined part pronounced differently from the rest:  

  many                   humanitarian                       friend                       weather

• Choose a word that has different stress pattern:

  interrupt                   international                       information                       intelligent

• Choose the best answer for the following sentence:

  I and my close friend are not in the same school now but we write ___________ regularly.
  
  

• Choose the best answer for the following sentence:

  _____________ money for her further study, she spent all her summer holiday to do a
  part-time job.
  
  

• Choose the best answer for the following sentence:

  Long: “Three new hotels _____________ in our city so far.”

  Thai: “What a good new!”
  
  

• Choose the best answer for the following sentence:

  Teacher: “You think that you came without __________ ?”

  Nam: “I’m sorry because I didn’t ask for your permission”
  
  

• Choose the best answer for the following sentence:

  He didn’t know what ___________ around him when he was sleeping.