Carbon dioxide has a chemical formula CO2 and a molar mass of 44.009 g/mol. It can be called on other names like Carbonic dioxide, Carbon(IV) oxide, Carbonic acid gas, Carbonic anhydride, and Dry ice in the solid phase. The carbon atom in Carbon dioxide is covalently double bonded to two oxygen atoms. In a gaseous state, it is a colorless gas. It doesn't smell at a low concentration but does smell sharp acidic when the concentration increases. Scottish chemist by the name Joseph Black discovered Carbon dioxide in the 1750s and called it "fixed air." He finds out that heating calcium carbonate or treating it with acids can produce carbon dioxide (fixed air).

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What is carbon monoxide?

Carbon monoxide is a gas it has a chemical formula CO. It has a molar mass of 28.010 g/mol. It is also called by other names such as Carbonous oxide and Carbon(II) oxide etc. It is harmful to those organisms which have hemoglobin in their blood. It causing toxicity when the concentrations increase from above  35 ppm. It is a flammable gas burn with a blueish flame. The gas has no odor, taste, and color. Large amount is produced during incomplete or partial oxidation of carbon-containing compounds.