Question

Calculate the molar mass of BaSO₄.

Answer 1

1. Molar mass is the sum of the masses of all the individual atoms present in a molecule or compound.
2. The chemical formula of barium sulfate BaSO₄.
3. The atomic mass of Barium (Ba) is 137 u.
4. The atomic mass of Sulphur (S) is 32 u.
5. The atomic mass of Oxygen O is 16 u
6. $\mathrm{Molar}\mathrm{mass}\mathrm{of}{\mathrm{BaSO}}_4=(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{Ba})\mathrm{x}1+(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{sulphur})\mathrm{x}1+(\mathrm{Atomic}\mathrm{Mass}\mathrm{of}\mathrm{Oxygen})\mathrm{x}4$

$=(137\mathrm{x}1)+(32\mathrm{x}1)+(16\mathrm{x}4)$

$=137+32+64$

$=233$

Molar mass of BaSO₄ is 233 g mol^-1.