Trong số những hợp chất HCOOH; CH3COOCH3; ClNH3CH2COOH; HOCH2C6H4OH; CH3COOC6H5. Số hợp chất tác dụng với NaOH theo tỷ lệ 1:2 về số mol là

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  The pen won’t write; it _________ out of ink.
   

• Choose the best answer for the following sentence:

  The line is busy; someone __________ the telephone now.
   

• Choose the best answer for the following sentence:

  Tom is absent; he __________ sick again now.
  
  

• Choose the best answer for the following sentence:

  He ____________ his job because he seems very happy.
   

• Choose the best answer for the following sentence:

  She told me that she'd rather ___________ on the committee.
   

• Choose the best answer for the following sentence:

  To check for acidity, one had better ___________ litmus paper.
   

• Choose the best answer for the following sentence:

  Would you please _____________?
   

• Choose the best answer for the following sentence:

  Please ______________ Xerox copies of copyrighted material without the permission of the publisher.
   

• Choose the best answer for the following sentence:

  ''Do you want to go to Miami by bus or by train?”

  “I _____________ by train.”
   

• Choose the best answer for the following sentence:

  “Are you still going to Florida for vacation?”

  “Yes, but I really ____________ because I don’t have much money.”