Question

Calculate the molecular mass of Sulphuric acid $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$.

Given Atomic masses: H = 1u, S = 32u, 0 = 16u

Answer 1

Step 1: Calculating the molecular mass

Molecular mass is equal to the sum of atomic masses of all the atoms present in one molecule of a substance.

Step 2: Given data

Atomic masses: H = 1u, S = 32u, 0 = 16u

Step 3: Finding the molecular mass for the given data

The molecular mass of $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ = (Number of hydrogen atoms x atomic mass of hydrogen) + (Number of sulphur atoms x atomic mass of sulphur) + (Number of oxygen atoms x atomic mass of oxygen)

The molecular mass of $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ = $\left(2\times 1\right)+\left(1\times 32\right)+\left(4\times 16\right)$

The molecular mass of $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ = $2+32+64=98$ g/mol

Hence, the molecular mass of Sulphuric acid $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ is $98$ g/mol