Question

Calculate the molecular mass of Calcium carbonate $\left({\mathrm{CaCO}}_3\right)$

Given Atomic masses: Ca = 40u, C = 12u, O = 16u

Answer 1

Step 1: Calculating the molecular mass

Molecular mass is equal to the sum of atomic masses of all the atoms present in one molecule of a substance.

Step 2: Given data

Atomic masses: Ca = 40u, C = 12u, O = 16u

Step 3: Finding the molecular mass for the given data

The molecular mass of $\left({\mathrm{CaCO}}_3\right)$ = (Number of calcium atoms x atomic mass of calcium) + (Number of carbon atoms x atomic mass of carbon) + (Number of oxygen atoms x atomic mass of oxygen)

The molecular mass of $\left({\mathrm{CaCO}}_3\right)$ = $\left(1\times 40\right)+\left(1\times 12\right)+\left(3\times 16\right)$

The molecular mass of $\left({\mathrm{CaCO}}_3\right)$ = $40+12+48=100$ g/mol

Hence, the molecular mass of Calcium carbonate $\left({\mathrm{CaCO}}_3\right)$ is $100$ g/mol