Atomic and Molecular Masses

✅ Atomic and Molecular Masses

➖Atomic Mass:

Mass of an atom.

Reported in atomic mass unit “amu” or unified mass “u”

One atomic mass unit i.e. amu, is the mass exactly equal to one-twelfth the mass of one carbon-12 atom.

➖Molecular Mass:

Mass of a molecule of covalent compound.

It is equal to the sum of atomic masses of all the elements present in the molecule.

Formula Unit Mass

Mass of a molecule of an ionic compound

It is also equal to the sum of atomic masses of all the elements present in the molecule 

✅ Mole Concept:

➖Mole:

Unit of amount of substance.

One mole amount of substance that contains as many particles or entities  as there are atoms in exactly 12 g of the 12C isotope.

➖Molar mass:

Mass of one mole of a substance in gram

Molar mass in gram in numerically equal to atomic/molecular/formula mass in amu or u.