Question

What is the molecular mass of $\mathrm{CaO}$?

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. Formula for molecular mass of $\mathrm{CaO}$

• The molecular mass of $\mathrm{CaO}$=$\text{Atomic mass of Ca+A}\mathrm{tomic}\mathrm{mass}\mathrm{of}\text{O}$

Step3. Calculation of molecular mass of $\mathrm{CaO}$

The molecular mass of $\mathrm{CaO}$= $\left(\text{40.08+16}\right)\text{u}$

= $56.08\text{u}$

Hence, the molecular mass of $\mathrm{CaO}$ is $56.08\text{u}$.