The molar mass is defined as the mass of 1 mole of the given substance. To calculate the molar mass of the compound, we need an atomic weight of every atom present in the compound.
Sulfur atoms are an example for polyatomic molecules. The sulfur Molecule is made up of eight sulfur atoms.
The atomic weight of sulfur atom = 32g.
Molar mass of sulfur = 8 ✕ 32
∴ Molar mass of sulfur = 256g.