Mole
Mole
Chemist measures the amount of a substance in moles.
1 mole contains 6 x 10^23 particles,
and also known as the Avogrado number of particles (atoms, molecule, ion or electrons) in a substance.
The mass of 1 mole = the relative molecular mass in grams, molar mass
Example Moles of Elements
Amount : 1 mole of Carbon, C
Number
of partciles: 6 x 10^23
Mass in
grams
(Moler Mass) : 12g
Finding mass from moles:
Mass (g) = No. Moles x Molar mass
No. Moles = Mass (g) / Molar mass
Molar mass = Mass (g) / No. Moles
Moles of Compound/ Ionic Compound
A mole for a molecular compund contains
6 x 10^23 molecules.
It's mass is equal to its Relative Formula Mass.
A mole for an ionic compound also contains 6 x 10^23 ions.
Example
A mole of water molecule , (H2O), has a total mass of 18g.
