DEMO|TOPIC 03-MOLE CONCEPT

 

TOPIC 03-MOLE CONCEPT

What is mole?

Mole is a unit of measurements as any other units,

Example Pair, dozen, gross etc

1mole = 6.02 x 10²³ particles

Definition;

A mole is the amount of a substance as many as particles of elementary entities contained in 12g of carbon-12 isotopes. The particles can be atoms, molecules, electrons or ions. This is a unit mole which was introduced by Avogadro as 6.02 x 10²³ particles

Example; 1 mole of water (H₂O) contains 6.02 x 10²³ molecules

1 mole of sodium (Na) contains 6.02 x 10²³ atoms

1 mole of CuCl₂ contains 6.02 x 10²³ ions

1 mole of Fe contains 6.02 x 10²³ electrons

MOLAR MASS OF A SUBSTANCE

Molar mass: is the mass of I mole of any element or compound

Its SI unit is g/mol. It is denoted by M

For example; Na = its molar mass = 23g/mol

NaCl = its molar mass = 58.5g /mole

Na₂SO₄ = its molar mass = (23 x 2) + (32) + (16 x 4) = 142g/mol

NB: Molar masses and relative molecular mass of a substance are calculated from the formula of that substance.

READ MORE