Question

What is the molecular mass of ${\mathrm{H}}_2{\mathrm{SO}}_4$?

Answer 1

Molecular mass:- The sum of the masses of all the atoms present in the molecule is known as its molecular mass.

Explanation:-

Sulphuric acid (${\mathrm{H}}_2{\mathrm{SO}}_4$) is formed from-

1. 2-Hydrogen atoms
2. 1-Sulphur atom
3. 4-Oxygen atoms

Atomic mass of $\mathrm{H}$-atom = 1.008u

Atomic mass of $\mathrm{O}$-atom = 16u

Atomic mass of $\mathrm{S}$-atom = 32.06u

Mass of ${\mathrm{H}}_2{\mathrm{SO}}_4$ = $(2\times 1.008)\mathrm{u}+(1\times 32.06)\mathrm{u}+(4\times 16)\mathrm{u}$

Mass of ${\mathrm{H}}_2{\mathrm{SO}}_4$= $98.08\mathrm{u}$

Hence, the molecular mass of ${\mathrm{H}}_2{\mathrm{SO}}_4$ is 98.08u.