1. DO-NOW 5 mins 1. What do each of these words mean?
Pair b. Dozen c. Score
How many pairs of shoes are there in 18 shoes. ?
How many pairs of sticks are there in 3 sticks? (use unit conversions)
Convert 1 shoe to pairs of shoes. (use unit conversions)

2. WELCOME TO TRI 2
- UNIT 4 – MOLE CONCEPT 2 weeks long… so very quick, yet - Super important… (foundational in chemistry)

3. The mole as a unit
The SI unit for “AMOUNT OF SUBSTANCE” is the “MOLE” The ‘mole’ is defined as the number of particles equivalent to the number of Carbon atoms in 12 grams of Carbon-12. (C-12)

4. The mole as a counting noun
1 Dozen = 1 Pair = 1 Score = 1 mole = 6.022x1023

5. Practice Problems A dozen is to 12 what a mole is to a. 3.022 x 1023
b x 1023
c. Relative atomic mass of an element
d x 10-23

6. Practice
2. For which of the following quantities is the ‘mole’ a unit?
Mass b. amount of substance
c. Length d. temperature.

7. Practice
Avogadro’s number refers to the number ___________________________.
If there are 2 times avogadro’s number of sand grains on my roof, how many moles of sand grains is that?
How many chairs are there in one mole of chairs?

8. Converting between moles and number. (DO IN NOTEBOOK)
1. Convert 300 atoms into moles of atoms. 2. How many atoms are there in 0.5 moles of atoms

9. DO-Now Practice problems involving the mole
How many moles of tables. are there in x 1024 tables?
How many atoms of C are there in 2.3 moles of C?

10. Which has more things?
A mole of tables or a mole of feathers?

11. MASTERY CHECK 4.1
1. How many moles are there in 120 atoms? 2. How many N atoms are there in moles of N?

12. Which has a higher mass?
A mole of calcium (Ca) or a mole of Beryllium (Be)?

13. Molar Mass
The mass of 1 mole of a substance is called the MOLAR MASS of that substance. The units of molar mass is: QUESTION: If one toy car has a mass of 100 g, what is the molar mass of that type of toy car?

14. How do we know the molar mass of the elements?
Periodic Table shows us!!!! the atomic masses with the correct units… Eg. Ca Li Ar

15. NOTE
Relative atomic mass units (amu) Molar mass units ( g/mol )

16. For each of the following elements, write the molar mass with the correct unit.
Ga Kr H
4. Fe He N

17. Calculating molar masses of molecules
Examples
H b. HCl
c. Na2O c. H2O2

18. DO-NOW 6 minutes (write into your notebook)
What is meant by the term molar mass?
What is the common units for measuring molar mass.
Calculate/Write the molar masses for each of the following.
a. Li b. LiCl c. H2NO3
BONUS: how many amu are there in 1 gram?

19. HW: 5 mins Calculate the molar masses for the following compounds
NaOH *H2O2 Ca(OH)2 *Na2O

20. EXTRA PRACTICE: 5 minutes
Calculate the molar masses of each of the following.
Na2S b. H2SO4
c. Ca(NO3) Challenge: d. Ba2(PO4)3

21. REGROUP AND RECAP KEY CONCEPTS SO FAR
KEY CONCEPT 1: 1 mole pigs = 6.022x1023 pigs (much as … 1 dozen pigs = 12 pigs )

22. REGROUP AND RECAP KEY CONCEPTS SO FAR
KEY CONCEPT 1: 1 mole pigs = 6.022x1023 pigs knowing this lets us convert between MOLES of something and Number of things

23. TBT: example CALCULATIONS MC 4.1 (was 5 pts)
1.How many moles of atoms are there in 120 atoms? 2. How many N atoms are there in moles of N?

24. REGROUP AND RECAP KEY CONCEPTS SO FAR
KEY CONCEPT 1: 1 mole pigs = 6.022x1023 pigs KEY CONCEPT 2: Molar mass of something is the mass of 1 mole (6.022x1023 ) of something. (much like dozen price = price of 12 pens) KEY CONCEPT 3: Molar mass has units of g/mol

25. Mastery CHECK 4.2 (15 minutes) (6pts)
 1. How many Ar atoms are there in moles of Ar? [0.5pt]
2. What is meant by the term molar mass? [1pt] ____________________________________________________________________________________________________________________________________________________________________________________
3. What are the units for molar mass? ____________. [1pts]
4. Calculate the molar masses of the following. [3pt]
a. Ar b. NaCl   c. H2O

26. HW: log onto Proprofs. Complete HW 4.1 (due on Tomorrow)

27. REGROUP AND RECAP KEY CONCEPTS SO FAR
KEY CONCEPT 1: 1 mole pigs = 6.022x1023 pigs knowing this lets us convert between MOLES of something and Number of things

28. DO-NOW 6 mins What is the molar mass of the following elements?
a. Na b. Al c. K
2. Calculate the molar masses of the following compounds
CaO b. H2S
3. How many moles of N2 are there in x1025 molecules of N2 ?
4. How many molecules of H2 are there in moles of H2 ?

29. TBT Mastery CHECK 4.2 (15 minutes) (6pts)
 1. How many Ar atoms are there in moles of Ar? [0.5pt]
2. What is meant by the term molar mass? [1pt] ____________________________________________________________________________________________________________________________________________________________________________________
3. What are the units for molar mass? ____________. [1pts]
4. Calculate the molar masses of the following. [3pt]
a. Ar b. NaCl   c. H2O

30. Molar Mass allows us to convert from MOLES TO GRAMS
EX. 1. How many moles of O2 are there in g of O2?

31. Example 2
How many grams of water are there in 0.12 moles of water? (Molar mass of water is g/mol)

33. DO-NOW [6mins]
1. Calculate the number of N2 molecules in moles of N2 2. How many grams of N2 are there in moles of N2 3. If a pen has a mass of 5.0 g, what is the molar mass of a pen (give correct units).

34. Molar Mass allows us to convert from MOLES TO GRAMS
EX. 1. How many moles of O2 are there in g of O2?

35. Example 2
How many grams of water are there in 0.12 moles of water? (Molar mass of water is g/mol)

36. Practice
How many grams of HCl are there in moles of HCl? (Molar mass of HCl is g/mol)
2. How many moles of HCl are there in 3.50 g of HCl?

37. More practice from HW
Go over. Page 50 and 52. (answers in booklet so you can check your own answer.)

38. Mastery Check 4.4
What is the molar mass of the following elements? 1pt
a. Co b. Cu c. Fe
2. Calculate the molar masses of the following compounds. 1pt
CaCl b. H2SO4
3. How many moles of CaCl2 are there in g ? [3pt]
Convert moles of CaCl2 to grams. [3pt]
5. How many molecules of water are there in moles of water? [2pt]

39. DO-NOW (6 mins) Calculate the molar mass of CaCl2
2. How many moles of CaCl2 are there in g ? [3pt]
3.Convert moles of CaCl2 to grams. [3pt]
4. How many molecules of water are there in moles of water? [2pt]

40. REGROUP AND RECAP KEY CONCEPTS SO FAR
KEY CONCEPT 1: 1 mole pigs = 6.022x1023 pigs knowing this lets us convert between MOLES of something and Number of things

41. REGROUP AND RECAP KEY CONCEPTS SO FAR
KEY CONCEPT 1: 1 mole pigs = 6.022x1023 pigs KEY CONCEPT 2: Molar mass of something is the mass of 1 mole (6.022x1023 ) of something. (much like dozen price = price of 12 pens) KEY CONCEPT 3: Molar mass has units of g/mol

42. Molar Mass allows us to convert from MOLES TO GRAMS
EX. 1. How many moles of O2 are there in g of O2? 𝑔 O2 1 x 1 𝑚𝑜𝑙 O 𝑔 O2 = 1.75 moles of O2

43. We can convert directly form grams to number of things… via moles of course.
2- step conversion.
Example: Calculate the mass of x1023 atoms of Li

44. Example 2
How many atoms are there in g of Ne?

45. Independent Practice 1 (3 mins each)
How many atoms are there in 54.0 g of Al?
2. How many grams of Ga are there in 6.022x1021 atoms of Ga.

46. Practice
Pages practice problems in mole concept packet!

47. HOMEWORK
Independently Review Unit 4. Practice all types of calculations and the key concepts we have dealt with # 1-3

48. MC # 4.5 (10 mins)

49. DO-NOW (put your mole packet on your desk. Nti will come and check HW)
DO-NOW (put your mole packet on your desk. Nti will come and check HW) 6 mins
Calculate the molar masses of the following compounds
NaCl b. Ca3(PO4)2
2. How many grams of NaCl are there in moles of NaCl?
3. How many moles of NaCl are there in 1.67 x1021 formula units(molecules) of NaCl

50. Independent timed attempt 3 minutes max
Independent timed attempt 3 minutes max. Raise your hand once you are done!
A student needs mol of zinc for a reaction. What mass of zinc in grams should the student obtain from the shelf?

51. Independent timed attempt 2 minutes max
Independent timed attempt 2 minutes max. Raise your hand once you are done!
2.How many moles of lithium are there in x 1024 lithium atoms?

52. Attempt 3 [ 3 minutes]
How many moles of carbon dioxide(CO2) are in 66.0 g of dry ice (dry ice is solid CO2)?

53. TBT and a slight twist. Attempt 4: (Hint- plan first…)
What is density? What are some units of density? Why is density considered an intensive property? Calculate the volume occupied by moles of diamonds given that the density of diamond is 3.51 g/cm3. (P.S. a diamond is an element. It is made up of only C atoms so its formula is C)

54. Challenge: Attempt 5 [4 minutes]
How many boron atoms are there in 2.00 g of boron?

55. INDEPENDENT PRACTICE (15 MINUTES)
Pages 57 TO 58 of mole concept packet!

56. HOMEWORK!
Everyone received a link from proprofs.com! Log in and complete the latest take-home quiz (20 pts)