who is molar mass concept
Answers
Moles are extremely useful for finding the amount of atoms in a substance. By using a special number called Avogadro’s Constant (6.022e23) you can find out the Molar Mass of a single element by looking at its Atomic Mass Unit!
For example, Aluminum has an atomic mass of ~27 (Almost all periodic tables have the atomic mass listed underneath the element symbol). Avogadro’s Constant is special because 6.022e23 atoms of Aluminum weigh exactly… 27 grams. We write the molar mass of a substance like this: 27 g/mol.
Lets find the molar mass of a compound such as Uranium Hexafluoride (UF6). If we look on the periodic table, we find out that Fluorine has an atomic mass of roughly 19 amu’s, and Uranium has an atomic mass of roughly 238 amu’s. Because there are six Fluorines, we can find the atomic mass of a single UF6 molecule by doing (19*6)+238 - since there are six Fluorine atoms and one Uranium atom in the molecule. This adds up to 352 amu’s, so the molar mass of Uranium Hexafluoride is 352 grams (in proper notation - 352 g/mol).
The molar mass of a substance is the mass of one mole of that substance. Because of the nature of the mole, the atomic mass of an element in atomic mass units is equal to the molar mass of that substance in grams. Molar mass is useful in finding the number of moles of a substance within a given sample