Cho các phương trình ion rút gọn sau :

a) Cu2+ + Fe --> Fe2+ + Cu

b) Cu + 2Fe3+ --> 2Fe2+ + Cu2+

c) Fe2+ + Mg --> Mg2+ + Fe

Nhận xét đúng là :    

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

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  He likes drinking wine. The wine is imported from Scotland.
  
  

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  I warned them against crossing the park at night, (to cross).

   

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  My mother bought the food this morning. It is very fresh.
  
  

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  potholes / fill up / village roads / wide and clean.

   

   

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  trees / plant / grow / green / make / the place / more beautiful.

   

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

  Customers are given a 5% discount at the shop which newly opened on our street.

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  our village.