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    The Mole

 

The mole  (abbreviation: mol) is the amount of substance equal to 6.02 x 1023 particles

These particles can be atoms, ions, formula units,molecules, electrons, etc

Example:

            1 mole = 6.02 x 1023 atoms
IN GENERAL: 1 mole = 6.02 x 1023 particles
How many moles of carbon dioxide are if we have  6.00 x 1024 molecules of carbon dioxide?
 

Molar Mass:  The mass of one mole of substance ( 6.02 x 1023 particles).

It is equal to the atomic mass from the periodic table , expressed in grams.

 

Atomic mass:  the average mass of all the isotopes of an element considering their percentage of abundance.
The atomic mass can be expressed in amu´s (mass of atoms) or in g (mass of mole of atoms).
An amu (atomic mass unit) is the mass of 1/12  of one atom of 12C.
 

The molar mass can be: atomic mass (for atoms), molecular mass (for molecules) or formula mass (for salts), but the term molar mass can be applied to all of them

 

Examples: What are the molar masses of Carbon, Sodium Chloride, Carbon Dioxide, Oxygen Atoms and Oxygen Molecules?

 
Remember: 1 Mole = Molar Mass (in grams)
 

What is the mass of 0.250 moles of sodium?