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- 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

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