1 Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)  Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
Amoxicillin fights bacteria in the body. Clavulanate potassium is a form of clavulanic acid, which is similar to penicillin. Clavulanate potassium fights bacteria that is often resistant to penicillins and other antibiotics.
The most important thing you need to know is that Clavamox is a broad-spectrum antibiotic. It is the veterinary equivalent of Augmentin for humans. To get a little technical, it is a type of penicillin generically known as amoxicillin trihydrate/clavulanate potassium. Luckily for the average owner, the brand name of the drug, Clavamox, is much easier to say. Clavamox was developed specifically for veterinary use in dogs and cats.