Encyclopedia > 242 BC

  Article Content

242 BC



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Citric acid

... formula is C6H8O7 and the structure is O OH \\/ O H C H O \\ | | | // C - C - C - C - C ...