Cho các phân tử : H₂, CO₂, Cl₂, N₂, I₂, C₂H₄, C₂H₂. Bao nhiêu phân tử có liên kết ba trong phân tử ?

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  It is said that reading ______________ of a child when he leams to evaluate information in the book.
   

• Choose the best answer for the following sentence:

  The ______________ child (between 2 to 11 years of age) spends around 1,197 minutes per week watching television.
   

• Choose the best answer for the following sentence:

  ______________ can be quite a good start for babies to get acquainted to reading.
   

• Choose the best answer for the following sentence:

  To ______________ the habit of reading is to construct for yourself a refuge from almost all the miseries of life.
   

• Choose the best answer for the following sentence:

  The city libraries present a gloomy picture of the ____________ who used to flock the libraries every evening.
   

• Choose the best answer for the following sentence:

  Hundreds of books in the library lie ___________ gathering dust, and most of them remain ungrouped.
  

• Choose the best answer for the following sentence:

  There is a pool of shoe styles available on the market. Which style you choose is just a matter of ___________.
   

• Choose the best answer for the following sentence:

  It's much more convenient to take a _____________ and enjoy things that are carefully prepared for you.
  
  

• Choose the best answer for the following sentence:

  The picture was still highly appreciated because it is a _____________ of the original picture.
   

• Choose the best answer for the following sentence:

  The hero's house was full of medals awarded for his ____________.