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What Is A Mole?. A mole is set by using the standard 12 grams of carbon-12 like 12.93 grams of Nerds. What Is A Mole?. 1 mole is a very big number 602000000000000000000000 or 6.02 X 10 23 This is like saying 1 dozen is 12, or 1 serd is 168.

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What Is A Mole?


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what is a mole
What Is A Mole?
  • A mole is set by using the standard 12 grams of carbon-12

like 12.93 grams of Nerds

what is a mole1
What Is A Mole?
  • 1 mole is a very big number

602000000000000000000000

or

6.02 X 1023

  • This is like saying 1 dozen is 12, or 1 serd is 168
what is a mole2
What Is A Mole?
  • 1 mole = 6.02 X 1023 representative particles
  • Representative particles are atoms, molecules, ions, or formula units
  • How many atoms are in 1 mole of magnesium?
  • 6.02 X 1023 CO2 molecules is how many moles?
molar mass
Molar Mass
  • The mass of 1 mole of any substance
  • It is calculated by looking at the atomic mass of an element or elements on the periodic table
  • Then multiply by how many you have and add the total
slide5

Example

H2 O

H 1.0 X 2 hydrogens = 2.0

O 16.0 X 1 oxygen = +16.0

18.0 g/mol

the units are grams

1 mol

slide6

Example

H2 O

H 1.0 X 2 hydrogens = 2.0

O 16.0 X 1 oxygen = +16.0

18.0 g/mol

the units are grams

1 mol

mole conversions
Mole Conversions
  • Mass to moles or moles to mass

Use molar mass (periodic table)

Example : How many moles are in 3.0 g of water?

slide10

3.0 g H2 O

g H2 O

mole conversions1
Mole Conversions
  • Moles to Number of Atoms, Molecules, Formula Units or the reverse

Use Avogadro’s number 6.02 X 1023

Example : How many molecules are in 2.0 moles H2 O?

slide17

2.0 moles H2 O

1 mole H2 O

slide19

2.0 moles H2 O 6.0 X 1023 molecules H2 O

1 mole H2 O

= 1.2 X 1024 molecules H2 O

mole conversions2
Mole Conversions
  • Moles to Volume of a gas or volume of a gas to moles

Use molar volume 22.4 L/mol (liter/1mole)

Example: How many moles are in 11.2 L of oxygen gas?

slide21

11.2 L O2

22.4 L O2