## Explanation

### Molar Mass of Sodium Azide

To find the molar mass of sodium azide ($\text{NaN}_3$), we need to determine the sum of the atomic masses of each element in the compound.

### Atomic Masses:

**Sodium (Na)**: 22.99 g/mol**Nitrogen (N)**: 14.01 g/mol

### Calculations:

Sodium azide consists of one sodium atom and three nitrogen atoms. Therefore, the total molar mass is calculated as follows:

$\text{Molar Mass of NaN}_3 = \text{Molar Mass of Na} +$ $+ 3 \times \text{Molar Mass of N}$Inserting the atomic masses:

$\text{Molar Mass of NaN}_3 = 22.99 \, \text{g/mol} + 3 \times 14.01 \, \text{g/mol}$Performing the multiplication and summation:

$\text{Molar Mass of NaN}_3 = 22.99 \, \text{g/mol} + 42.03 \, \text{g/mol}$Thus, the molar mass of $\text{NaN}_3$ is:

$\text{Molar Mass of NaN}_3 = 65.02 \, \text{g/mol}$Hence, the molar mass of sodium azide ($\text{NaN}_3$) is **65.02 g/mol**.