Từ 16,20 tấn xenlulozơ người ta sản xuất được m tấn xenlulozơ trinitrat (biết hiệu suất phản ứng tính theo xenlulozơ là 90%). Giá trị của m là

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Một số câu hỏi khác có thể bạn quan tâm.

• Find a mistake in the four underlined parts of the sentence and correct it:

  The circumstances of its eventual destructive are a source of debate that whether it was

  destroyed in a great fire in 475 or not.

• Find a mistake in the four underlined parts of the sentence and correct it:

  More than 80% of home pages in the Web are in English, while the next greatest, German,

  has only 4.5% and Japanese 3.1%.

• Find a mistake in the four underlined parts of the sentence and correct it:

  The number of people with English as a second language are overtaking the number of

  people for whom the language is their mother tongue.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  The most distinguishing differences between American English and British English is in

  pronunciation and vocabulary.

• Find a mistake in the four underlined parts of the sentence and correct it:

  There are wide varieties of American dialects, some of that appear to be diverging markedly from others.

• Find a mistake in the four underlined parts of the sentence and correct it:

  The use of English ethnic dialects vary from region to region and social group to social group.

• Choose the word that has the underlined part pronounced differently from the rest:

  follow                  job                      geography                     develop

• Choose the word that has the underlined part pronounced differently from the rest:

  awful                   quality                        corner                      fourteen 

• Choose a word that has different stress pattern:

  enjoy               prevent               special                  attend

• Choose a word that has different stress pattern:

  different                disabled                 consuming                    activity