Is carbon dioxide a pure substance or mixture?

Answer by  HelpChat (494)

Carbon dioxide is a molecule. By itself, it is a pure substance, although humans rarely encounter pure carbon dioxide. In nature, carbon dioxide mixes with other elements and molecules, including nitrogen, oxygen, carbon monoxide, sulfuric acid, and ozone, to form what we mortals call--air.

Answer by  jlwilson6 (1098)

Carbon Dioxide is a molecule substance. It is a compound. It is formed during the decomposition of organic matter. Carbon dioxide is an odorless and colorless gas.