1. Launch: 11/23
 Grab your binder and immediately take a seat!
 Place homework (practice questions from Thursday) on
desk
 Read handout “The Mole” and answer all 4 questions

2. Announcements
 This is a really important week!
 Points end on Wednesday
 Be engaged
 Be respectful

3. What is a mole?
Mr. Heffner
11/23/09

4. What is a mole?

5. What is a mole?
 A mole is a unit of measurement.
 1 dozen eggs = 12 eggs
 1 mole eggs = 6.02 X 1023 eggs
602,000,000,000,000,000,000,000
That’s a really big number!
Scientific Notation

6. What is a mole?
 1 mole of __________ = 6.02 X 1023 _____________
 Moles are used for atoms and molecules
 Because they are so tiny!
“Six point 0 two times ten to the twenty-third”

7. Who defined the mole?
 Amadeo Avogadro in 1811
 Avogadro’s number
6.02 X 1023 atoms
“the number of
atoms in 12g of
carbon-12 is equal
to 1 mole”
..or particles, or molecules

8. “The Mole” handout
 Using your notes, add more information to each of
your answers from the launch
 Pair, share

9. Practice Questions
 Answer the following in complete sentences:
1. What is a mole?
2. How is a mole defined?
3. What is Avogadro’s number (in standard and scientific form)?
4. How many pencils are there in 1 mole of pencils?
5. How many oxygen (O) atoms are there in one mole?
6. How many particles are found in 1 mole of sodium (Na)?
7. One mole of nitrogen gas (N2) is equal to how many
molecules?
8. How many moles are there in 12g of carbon-12?
9. How many moles are there in 24g of carbon-12?

10. Exit Slip
1. Which of the following is true about a mole?
a. It is a very small number.
b. It is a unit of measurement used to quantify numbers
of atoms, molecules, and particles.
c. It is defined as the number of grams in an atom.
d. It has a different value depending on the type of
element.

11. Exit Slip
2. One mole is defined as
a. the number of atoms found in 12g of carbon-12
b. the number of atoms found in 12g of carbon-14
c. the number of eggs in one dozen
d. 6.02 grams of carbon-12

12. Exit Slip
3. Avogadro’s number is
a. 6 X 1023
b. 6.02 X 23
c. 6.02 X 1023
d. 10 X 623

13. Exit Slip
4. How many oxygen-16 (O) atoms are there in 1 mole?
a. 1.00 atoms
b. 16.00 atoms
c. 602 atoms
d. 6.02 X 1023 atoms

14. Exit Slip
5. How many moles are there in 6g of carbon-12?
a. .5 moles
b. 1 mole
c. 2 moles
d. 12 moles

15. Homework
 Finish practice questions