Question

What is the molar mass of $\text{NaCl}$ (table salt)?

Answer 1

Step1. Molar mass

The mass of $1$ mole of a substance is called its molar mass.

Step2. Formula for molar mass

Molar mass =$\text{The atomic mass of element × number of atoms given in subscript}$

Step3. Molar mass of $\text{NaCl}$

Molar mass of $\text{NaCl}$=$\left(\text{Atomic mass of Na+}\mathrm{Atomic}\mathrm{mass}\mathrm{of}\text{Cl}\right)$

=$\left(22.99+35.45\right){\text{g mol}}^{-1}$

= ${\text{58.44 g mol}}^{-1}$

Hence, the molar mass of $\text{NaCl}$ is .${\text{58.44 g mol}}^{-1}$.