Question

Molar mass of ${\mathrm{NaNO}}_3$ is

Answer 1

Molar mass:

• The molar mass is actually the sum of the total mass in grams of the atoms present in the molecule.
• The unit of the molar mass is $\mathrm{g}{\mathrm{mole}}^{-1}$.

Step 1: Molar mass of ${\mathrm{NaNO}}_3$:

The atomic mass of sodium ($\mathrm{Na}$) $=23\mathrm{g}$
The atomic mass of nitrogen ($\mathrm{N}$) $=14\mathrm{g}$
The atomic mass of oxygen ($\mathrm{O}$) $=16\mathrm{g}$
Molar mass of ${\mathrm{NaNO}}_3$ is$=\mathrm{Mass}\mathrm{of}\mathrm{Na}+\mathrm{Mass}\mathrm{of}\mathrm{N}+\mathrm{Mass}\mathrm{of}\mathrm{O}$

$$\begin{gathered} =23+14+16\times 3 \\ =23+14+48 \\ =85\mathrm{g} \end{gathered}$$