Lewis Dot of Carbon Monoxide
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).