Question

Calculate the molar mass of Sulphuric acid, ${\mathrm{H}}_2{\mathrm{SO}}_4$

Given the atomic masses of H = 1u, S = 32u, O = 16u

Answer 1

Step 1: Calculating the molar mass

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

Step 2: Given data

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

Step 3: Finding the molar mass for the given data

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

The molar mass of ${\mathrm{H}}_2{\mathrm{SO}}_4$ = $2+32+64=98$g/mol

Hence, the molar mass of Sulphuric acid ${\mathrm{H}}_2{\mathrm{SO}}_4$ is $98$g/mol