What is a dozen?
How many objects are in a dozen?
Does it matter the type objects in a dozen?
Can you have fractions or multiples of a dozen?
A mole is a quantity, just like a dozen
It can be applied to any type of elements or compounds,
it is just a quantity
You can have multiples of a mole (4 moles) or fractions
of a mole (1/3 mole)
A mole is equal to
That’s 602 000 000 000 000 000 000 000
Here's an interesting read for you....
https://what-if.xkcd.com/4/
The mole works just like dozens because it is a
quantity
2 moles = ___________________________
½ mole = ___________________________
The mole was proposed by an Italian chemist
named Amedeo Avogadro
Avagadro based his research on gases and
determined that 22.4L of any gas contained the
same number of particles (atoms or molecules)
From this he created AVOGADRO’S NUMBER
which was 6.02 x 1023
is a term that refers to the type
of particles a substance is made up of
The representative particles are the units for different
types of atoms and compounds.
It is important when calculating moles to know what type
of particles a substance is made of
Mg is an __________
--- therefore its representative units
element
atoms
are _________
ionic compounds
NaCl is an __________________
--- therefore its
formula units
representative units are ___________________
molecular compound --- therefore its representative
H2O is a _______________
molecules
units are ______________________
ion
OH-1 is an ________________
-- therefore its
ions
representative units are ____________
: What types of representative units do the following
have?
1. SO2
Molecules because it is a molecular compound
2. NaOH
Formula units as it is an ionic compound
________________________________________
3. Cu
Atoms as Cu is an element
________________________________________
4. Cu3PO4
Formula units as it is an ionic compound
________________________________________
5. Ca+2
Ions as it is an ion
________________________________________
6. AsCl3
Formula units as it is an ionic compound
________________________________________
7. H2O
Molecules because it is a molecular compound
________________________________________