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THIRD QUARTER
SCIENCE - THIRD QUARTER
Mole
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Mole Concept
- A useful way to express how much of a substance there is.
Two Components of measurment:
Magnitude
in
numbers
and the unit which the
magnitude
is
expressed.
Mole
- A count of sizable number of particles.
Mole
- A substance that contains exactly
6.02
x
10
^
23
particles.
6.022x10^23
- Known as the avogadro's constant denoted by the symbol
'NA'
The number of moles of a substance in a
given pure sample can be represented by the
following formula:
n = N/NA
German chemist
Wilhelm Ostwald
coined the
term "
mole
," which he derived from the Latin word
moles
,
which means "
a heap or pile.
"
Atomic Mass
- Mass of a single atom of an element, Expressed as
atomic mass units
or
AMU.
Molecular Mass
- The total atomic masses of an element's constituent
elements make up its
molecular mass.
Molar Mass
- It is defined as the total mass of one mole of the
substance. It is often represented as ‘grams per mole’
(g/mol).