Molar mass and atomic number are distinct concepts; atomic number refers to the number of protons in an atom, while molar mass relates to the mass of a substance in grams per mole. To find molecular mass and molar mass, one can use atomic weights defined in atomic mass units, with molar mass being the weight in grams derived from these values. Avogadro's number is crucial as it connects the number of atoms or molecules to the mole concept. For more precise understanding, researching specific topics like "molar molecular mass relationship" can provide clarity. Engaging with detailed questions will yield better guidance on these concepts.