Cho dung dịch NaOH vào dung dịch muối Z, lúc đầu thấy xuất hiện kết tủa màu trắng hơi xanh, sau đó chuyển dần sang màu nâu đỏ. Công thức của Z là:

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  The girls shows great interest in photos and pictures, which meant that she is _____________ artistic field.

   

• Choose the best answer for the following sentence:

  The double-digit inflation has created the ___________________ among women as they go to the market every day.

   

• Choose the best answer for the following sentence:

   That a woman is keen on and takes part in the ____________ is no longer strange to most people.

                     

• Choose the best answer for the following sentence:

   In some places in the world, many people ____________ basic human rights.

   

• Choose the best answer for the following sentence:

  I would like to take this ______________ to thank you for supporting me during the hard time.

• Choose the best answer for the following sentence:

   In the modem time, women are more independent, not less ______________ towards their husbands.

   

• Choose the best answer for the following sentence:

   Sheila Hammond, who was only twenty-three when she was elected as a Member of Parliament, said she owed her success all to the way she had been ______________ by her mother, Mary.

   

• Choose the best answer for the following sentence:

   Her father had died of a heart attack when she was only two after his business had been ______________ following a financial scandal.

   

• Choose the best answer for the following sentence:

   Criminal charges had been ______________ him but the matter was closed on his death.

   

• Choose the best answer for the following sentence:

   The press decided to _______________ this information without being able to get at the truth thanks to Mary's skilful management.