Give the molecular formula, the condensed formula, and indicate the number of hydrogens each carbon has in the octane molecule.

Solution:

An 8-carbon alkane has 18 hydrogens and its molecular formula is: C 8 H 18 . The condensed formula is given by: CH 2 (CH 2 ) n CH 3 .

The formula developed in which the carbons and hydrogens that the molecule has are indicated is: