Question

Calculate the molar mass of Nitric acid (${\mathrm{HNO}}_3$). The atomic mass of H=1u, N=14u, O=16u.

Answer 1

1. Molar mass is the sum of the masses of all the individual atoms present in a molecule or compound.
2. Nitric acid is a strong acid which has a high oxidation power.
3. The chemical formula of Nitric acid is ${\mathrm{HNO}}_3$.
4. The atomic mass of Nitrogen N is 14 u.
5. The atomic mass of hydrogen H is 1 u.
6. The atomic mass of Oxygen is 16 u.
7. $\mathrm{Molar}\mathrm{mass}\mathrm{of}{\mathrm{HNO}}_3=(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{hydrogen})\mathrm{x}1+(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{nitrogen})\mathrm{x}1+(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{Oxygen})\mathrm{x}3$

$=(1\mathrm{x}1)+(14\mathrm{x}1)+(16\mathrm{x}3)$

$=1+14+48$

$=63\mathrm{g}$

The molar mass of HNO₃ is 63g.