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| 1. |
what is the differenc between molecular mass and molar mass? |
| Answer» Molecular mass gives the mass of a single molecule (sum of the atomic masses in the molecule), whereas molar mass gives the average mass of the molecule (mass of Avogadro number of molecules).– Therefore, the molecular mass of a molecule containing heavier isotopes can be few units higher than the molar mass.– Otherwise, the value of the molar mass and molecular mass is quiet the same for a similar molecule; only the units are different. The unit of the molecular mass is amu, and the unit of the molar mass is gmol-1.– It is accurate to use the molecular mass in calculations of higher amounts of molecules than using the molar mass.– Molar mass is a measurement, which can be given to atoms, molecules or compounds. But molecular mass is only determined in the molecules. If it is the mass of an atom, a different terminology called atomic mass is used. | |