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.
Man holding a roll of toilet paper Photo Credit humonia/iStock/Getty Images. Potassium bicarbonate is a bubbly medication that is used to neutralize acid in the stomach and boost potassium levels in those whose bodies are experiencing severe potassium deficiencies.he potassium in potassium bicarbonate also is a mineral needed for normal body functions. If the body does not ingest enough potassium, potassium bicarbonate can contribute additional amounts of the mineral, according to the Linus Pauling Institute at Oregon University.