Cho 2 mol KI vào dung dịch chứa kali đicromat trong axit sunfuric đặc có dư thu được đơn chất X. Số mol X là:

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  Many teenagers are not much ________________ in reading books, except for what they are made to read at school.
   

• Choose the best answer for the following sentence:

  This book _____________ to Peter. It is not mine.
   

• Choose the best answer for the following sentence:

  Have you ever read _____________ “Oliver Twist”, _____________ interesting novel written by Charles Dickens?
  
  

• Choose the best answer for the following sentence:

  I like ____________books better than ______________ films
  
  

• Choose the best answer for the following sentence:

  The room is too dirty. It ________________ now.
   

• Choose the best answer for the following sentence:

  The machine _____________ on by pressing this switch.
   

• Choose the best answer for the following sentence:

  Everybody agrees that no more staff _______________.
  
  

• Choose the best answer for the following sentence:

  Things ______________ clear to them so that they can do the work in the way that you have told them.
   

• Choose the best answer for the following sentence:

  Cigarettes _______________ at a bakery.
   

• Choose the best answer for the following sentence:

  The next meeting ________________ in May.