Để hòa tan hoàn toàn 19,225 gam hỗn hợp X gồm Mg, Zn cần dùng vừa đủ 800 ml HNO3 1,5M. Sau khi phản ứng kết thúc thu được dung dịch Y và 2,24 lít (đktc) hỗn hợp khí A gồm N2, N2O, NO, NO2 (trong đó N2O và NO2 có số mol bằng nhau) có tỉ khối với H2 là 14,5. Phần trăm về khối lượng của Mg trong X là         

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Một số câu hỏi khác có thể bạn quan tâm.

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  The pilot __________ land the plane on only one engine.
   

• Choose the best answer for the following sentence:

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• Choose the best answer for the following sentence:

  Excuse me, _________ I borrow your newspaper if you are not reading it?
   

• Choose the best answer for the following sentence:

  In the Middle East you __________ take care not to admire anything in your hosts’ home. They will feel that they have to give it to you.
   

• Choose the best answer for the following sentence:

  You __________ move this man; he is too ill. You’ll have to leave him here.
  
  

• Choose the best answer for the following sentence:

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• Choose the best answer for the following sentence:

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• Choose the best answer for the following sentence:

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