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Answer. The mass in grams of one mole of a substance is molar mass.
The gram per mole, abbreviated as g/mol, is the SI unit of molar mass.
Barium (Ba) has an atomic mass of 137 g.
Sulphur (S) has an atomic mass of 32 g.
Oxygen (O) has an atomic mass of 16 g.
= 137 + 32 + 16(4) =233 g/mol molecular mass
The mass of a sample of a chemical compound divided by the amount of material in that sample, measured in moles, is the molar mass of that compound in chemistry. The molar mass of a substance is a bulk attribute, not a molecular property.
