Hòa tan hoàn toàn 2,4 gam Mg bằng dung dịch H2SO4 loãng, thu được V lít H2 (ở đktc). Giá trị của V là  

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Một số câu hỏi khác có thể bạn quan tâm.

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

  appear                 address                   area                     agree

• Choose a word that has different stress pattern:

  receive                     complain                      impress                     monthly

• Choose a word that has different stress pattern:

  typical                 apartment                     newspaper                        statement

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

  The fighting started behind of the far goal.

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

  but                     cut                       Sun                       put

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

  relax                  chat                      famous                      calculation

• Choose the word whose stress is on the first syllable:

  relax                    famous                      remain                    pretend

• Choose the word whose stress is on the first syllable:

  respond                    model                  mistake                      object

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

  The flight departures from Tan Son Nhat airport at 9:30.

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

  He denied to open the letter and I believed him.