Lewis Dot of Carbon Monoxide CO 70 More Lewis Dot Structures Produced from the incomplete combustion of hydrocarbons. In the winter, it is important that furnaces have access to an ample supply of oxygen in the air. It is a colorless, odorless, tasteless gas that highly toxic to humans. CO contains a covalent double bond and a third bond that is considered to be coordinate covalent (both electrons in that bond come from the oxygen). from http://treefrog.fullerton.edu/chem/LS/CO_LS.html Chemical Demonstration Videos |