Hỗn hợp E chứa hai hợp chất hữu cơ đều mạch hở và không chứa nhóm chức khác gồm axit X hai chức và ancol Y đơn chức. Đốt cháy 7,2 gam E cần dùng 0,24 mol O2, thu được CO2 và H2O có tỉ lệ mol 1:1. Mặt khác đun nóng 0,18 mol E có mặt H2SO4 làm xúc tác, thấy chúng phản ứng vừa đủ với nhau, thu được một este X duy nhất có khối lượng m gam. Các phản ứng xảy ra hoàn toàn. Giá trị m là:         

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Một số câu hỏi khác có thể bạn quan tâm.

• Mark the letter A, B, C or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges:

  The economy is heavy depended on industry, and economic growth has always been of greater concern than environmental preservation.             

• Mark the letter A,B,C or D on your answer sheet to show the underlined part that needs correction:

  Mr. Smith along with his children and wife are going to the party tonight.         

• Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions:   

  The healthier he is, the most easy his life becomes.         

• Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions:   

  He plays not only the piano but also composes music.  

• Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions:   

  Included in the series are “The Enchanted Horses”, among other famous children’s stories.             

• Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

  The wooden fence surrounded the factory is beginning to fall down because of the rain.         

• Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

  Quinine, cinnnamon, and other useful substances are all derived of the bark of trees.         

• Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions:

  Mrs. Stevens, along with her cousins from New Mexico, are planning to attend the festivies.         

• Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions:

  A number of the American Indian languages spoken at the time of the European arrival in the New World in the late fifteen century have become extinct.         

• Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions:

  A smile can be observed, described, and reliably identify; it can also be elicited and manipulated under experimental conditions.