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Chemistry 121, Winter 2008, LA Tech
Types of formula for organic compounds
Chemical formula: Indicate the kind and number of each type of atom in the molecule.      
Condensed formula: Shows skeletal atoms in a molecule and places them in a sequential order that indicates bonding.
Structural  formula: Shows each atom and bonds in a molecule.    
Line-angle formula: The hydrogen atoms are removed from carbon chains, leaving just a carbon line skeleton with functional groups attached to it.