Hỗn hợp A gồm một ankan X và anken Y có cùng số nguyên tử C trong phân tử và có cùng số mol. Hỗn hợp này làm mất màu vừa đủ 80 (g) dung dịch brom 20%, còn đốt cháy hỗn hợp cho 13,44 lít CO₂ (đktc). X và Y có công thức phân tử là:

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  How _________ have your parents been married?
   

• Choose the correct sentence which is built from the words and phrases given:

  By contrast / the share / oil in total energy consumption / decrease / 95 percent / 80 percent / the same period
  
  

• Choose the best answer for the following sentence:

  What do people ___________ the 25^th wedding anniversary? Is it "silver anniversary"?
   

• Choose one sentence that has the same meaning as the root one:

  The station will be closed for some days because they are replacing the escalators.
  
  

• Choose one sentence that has the same meaning as the root one:

  That woman wrote to me so that I gave her some advice.
  
  

• Choose the best answer for the following sentence:

  Do you ___________ your birthday each year? 

   

• Choose the best answer for the following sentence:

  ___________ would you like to celebrate your birthday, at the day time or in the evening?  

• Choose the best answer for the following sentence:

  Do you ___________ your birthday cake or do you buy it?
   

• Choose the best answer for the following sentence:

  Last night I _________ to my close friend's birthday party.
   

• Choose the best answer for the following sentence:

  There __________ a lot of fruit and drinks at the party yesterday.