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Find the correct name and condensed molecular formula for the given group of compounds:
  
 
Answer variants:
7aa.PNG
Chlorine
butanal.PNG
17.png
Nihonium
22a.png
Butanal
Ethyne
  
1. C_2H_2
 
     Name :               Structure
 
   
 
2.  C_4H_8O 
 
  Name :               Structure