Question

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

Answer 1

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 $\mathrm{CO}$
• The molecular mass of $\mathrm{CO}$ =$\text{The atomic mass of C+ The atomic mass of O}$

Step3. Calculation of molecular mass of Carbon monoxide

The molecular mass of $\mathrm{CO}$ $=\left[12.01+16\right]\text{u}$

=$28.01\text{u}$

Step4. Molar mass

• The mass mole of a substance is called its molar mass.
• So, the molar mass is $28.01{\text{g mol}}^{-1}$

Hence, the molecular mass of Carbon monoxide is $28.01\text{u}$, and the molar mass of Carbon monoxide is $28.01{\text{g mol}}^{-1}$.