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Question

What is the molecular mass and molar mass of Carbon Monoxide?


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Solution

Step1. Molecular Mass

  • Molecular mass is the sum of atomic mass, measured in amu.
  • The mass of one carbon atom is equal to the atomic mass unit (formerly abbreviated as 'amu,' but now spelled as 'u' – unified mass) according to the latest IUPAC recommendation.

Step2. The formula for molecular mass of Carbon monoxide

  • The formula for carbon monoxide is CO
  • The molecular mass of CO =TheatomicmassofC+TheatomicmassofO

Step3. Calculation of molecular mass of Carbon monoxide

The molecular mass of CO =12.01+16u

=28.01u

Step4. Molar mass

  • The mass mole of a substance is called its molar mass.
  • So, the molar mass is 28.01gmol-1

Hence, the molecular mass of Carbon monoxide is 28.01u, and the molar mass of Carbon monoxide is 28.01gmol-1.


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