Molar mass of carbon monoxide (CO)

The molar mass of carbon monoxide (CO) is 28.01 g/mol.

Step-by-step calculation

Element	Atoms	Atomic mass	Subtotal
Carbon	× 1	12.011	= 12.011
Oxygen	× 1	15.999	= 15.999
Total			28.01 g/mol

Carbon monoxide is a colorless, odorless, and tasteless gas made of one carbon atom triple-bonded to one oxygen atom.
It forms when fuels burn without enough oxygen, and industry uses it to reduce metal ores and as a component of synthesis gas.
It is poisonous because it binds to hemoglobin roughly 200 times more strongly than oxygen does, which stops blood from carrying oxygen.

H₂O NaCl CO₂ C₆H₁₂O₆ H₂SO₄ Ca(OH)₂ CuSO₄·5H₂O C₈H₁₀N₄O₂

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CaCO₃ Calcium carbonate NaHCO₃ Sodium bicarbonate C₂H₅OH Ethanol CH₃COOH Acetic acid Na₂CO₃ Sodium carbonate C₇H₆O₂ Benzoic acid

What is the molar mass of CO?

The molar mass of carbon monoxide (CO) is 28.01 g/mol.

How do you calculate the molar mass of CO?

Multiply the atomic mass of each element by the number of its atoms in CO, then add the results: 1 × 12.011 (C) + 1 × 15.999 (O) = 28.01 g/mol.

What percentage of CO is Oxygen?

Oxygen makes up 57.12% of the mass of carbon monoxide (CO).