Molar mass distribution is often associated with the size and weight of a particular molecule. If you're looking for similar terms with the same meaning, you might consider using the phrase "molecular weight distribution." Other possible synonyms include "polydispersity index," "molecular size distribution," and "degree of polymerization distribution." Each of these terms describes the range of molecular weights or sizes that are present in a sample of molecules. By understanding the molar mass distribution of a substance, scientists can gain valuable insights into its properties and behavior. Whether you're studying polymers, proteins, or other complex materials, these terms can help you describe the distribution of molecules within a sample.