It is also called the relative molecular mass. The term molecular weight can be defined as the mass of a molecule. This simple calculation indicates that the mass of one mole of H 2O compound is 18 g.

Atomic mass of hydrogen = 1.00794 g/mol.

Let’s calculate the molar mass of H 2O compound. Therefore, the molar mass of a substance can be calculated by adding the atomic masses of each element present in that molecule. The molar mass of an element is the atomic mass of that element. But in general, it is given in the unit gmol -1 or g/mol. The SI unit for molar mass is kgmol -1 or kg/mol. The molar mass is obtained by dividing the mass of a particular substance by the amount of it. Molar mass is the mass of a mole of a particular substance. Key Terms: Atoms, Carbon, Isotope, Molar Mass, Mole, Molecular Weight What is the difference between Molar Mass And Molecular Weight – Definition, Formula, Units, Calculationģ. The main difference between molar mass and molecular weight is that molar mass gives the mass of a mole of a particular substance whereas molecular weight is the mass of a molecule of a particular substance. Molar mass and molecular weight are two such physical properties of substances. Therefore, it is very important to understand the chemical and physical properties of molecules in order to conduct chemical reactions and predict the final products. Almost all chemical reactions are involved the changes occur in molecules or compounds. These molecules can get attached to each other to form compounds.

Molecules are substances formed due to combinations of same or different atoms in different ratios. Main Difference – Molar Mass vs Molecular Weight

Formula mass vs molar mass