A.RELATIVE ATOMIC MASS AND RELATIVE MOLECULAR MASS
RELATIVE ATOMIC MASS:The average mass of one atom of the element when compare
with 1/12 of the mass of an atom carbon-12.
RELATIVE MOLECULAR MASS: The average mass of the molecule when compared with
1/12 of the mass of one atom of carbon-12
B.THE MOLE AND THE NUMBER OF PARTICLES
What is a mole?
:A mole is an amount of substance that contains as many particles as the number of atoms in exactly 12g of carbon-12.
Avogadro Constant: the number of particles in one mole of a substance.
: one mole of substances contain 6.02*10^23 particles.
C.THE MOLE AND THE MASS OF SUBSTANCES
:The mass of one mole of any substances is called its molar mass
:The value of molar mass of an element is equal to its relative atomic mass.