Cho m gam X gồm Na, Na₂O, Al, Al₂O₃ vào nước dư thấy tan hoàn toàn, thu được dung dịch Y chứa một chất tan và thấy thoát ra 4,48 lít khí H₂ (đktc). Sục khí CO₂ dư vào dung dịch Y, thu được 15,6 gam chất rắn X. Giá trị của m là:         

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  ______________ mortality rates are associated with many factors, including maternal realth, access to medical care, socio-economic conditions and public health practices.
  

• Choose the best answer for the following sentence:

  Few of them have made much ____________ in those branches of industry which give a variety and complexity to the affairs of a nation.
   

• Choose the best answer for the following sentence:

  They are conducting a campaign to ___________ the public about the dangers of smoking.
   

• Choose the best answer for the following sentence:

  The stores are __________ specials on sweaters this weekend.
   

• Choose the best answer for the following sentence:

  Schools' systems may also lead them to report scholarships in the calendar year of the __________ term.
   

• Choose the best answer for the following sentence:

  The public knows little of him, but in the ____________ he's known as a fine mathematician.
   

• Choose the best answer for the following sentence:

  If you're the ____________ and everybody thinks you'll win, how does anybody be against you?
   

• Choose the best answer for the following sentence:

  She ___________ a pair of shoes from among the dozen the salesgirl'd shown he
   

• Choose the best answer for the following sentence:

  He was very sorry, but he was compelled to give me back my _____________ and ask me to leave the school.
   

• Choose the best answer for the following sentence:

  He had good ____________ in his young days and can speak like a book when so minded.