1. Warm up 12-7-17 Balance and List the type of reaction
C3H O > CO H2O
2. What is the percent yield when you made g of ZnCl in lab but expected to get 36g?
1 a) 2Al + 3Pb(NO3)2   --->  3Pb + 2Al(NO3)3
b) C6H8 + 5O2 ---> 3CO2 + 4H2O
Agenda
Turn in lab Take QUIZ Notes Unit 5-4
Mole Poster
Homework
Dec 15 – Test & notebook check Dec 15 – 3rd extra credit Canvas
Dec 15 - Deadline to retake quizzes & redo online HW online

2. Balance and List the type of reaction
C3H O > CO H2O
2. What is the percent yield when you made 30 g of ZnCl in lab but expected to get 36g?

3. Quiz Topics (5 questions total): Evidences of chemical change (5-1)
Balancing equations (5-2)
Types of reactions (5-3)
Percent yield calculation (5-3)
-You’ll need a half sheet of paper
-You may use a calculator (no cell phone)
1 a) 2Al + 3Pb(NO3)2   --->  3Pb + 2Al(NO3)3
b) C6H8 + 5O2 ---> 3CO2 + 4H2O
2. 25% x 80g = 20g

4. Unit 5-4 Notes
Moles

5. STOICHIOMETRY The quantitative aspects of chemical reactions.
Precise measurement, a recipe for chemical reactions
Anyone that cook or bake? Different recipe will give different flavor even though the ingredients are very similar to each other. (2 cups of floor vs 3 cups)
Stoich is a recipe for making chemical reactions.

6. How do we count? 1 “dozen” donuts = ____ donuts
1 “century” = _____ year
1 “foot” = ______ inches

7. A “Mole” Mole = amount of a substance abbreviate as “mol”
1 mole = x 1023 particles
Avogadro’s Number
Based on the weight of carbon-12 atoms.
1 mole of any substance is equal to 6.02 x 10 23
1776 – 1856

8. Just How Big is a Mole?
Enough soft drink cans to cover the surface of the earth to a depth of over 200 miles.
602,200,000,000,000,000,000,000 unpopped popcorn kernels and spread them across the United States of America, the country would be covered in popcorn to a depth of over 9 miles.
If we were able to count atoms at the rate of 10 million per second, it would take about 2 billion years to count the atoms in one mole.

9. Molar Mass The mass of 1 mole of a substance (not 1 atom)
Units is gram / mol
Molar Mass vs. Atomic Mass
Copper Copper
6.022 x 1023 atoms 1 atom
63.5 g/mol amu

10. Calculate Molar Mass What is the molar mass of Carbon?
What is the molar mass of CO2?
What is the molar mass of sugar?
Sugar = C6H12O6
Calculate the mass of a compound
C = 12g x 6
H = 1g x 12
O = 16 x 6

11. Check-In How many atoms are in 1 mole of carbon? 6.022 x 1023 atoms
How many molecules are in 1 mole of H2O?
6.022 x 1023 molecules
What is the atomic mass of carbon?
Atomic mass= 12 amu (1 atom of carbon)
What is the molar mass of carbon?
Molar mass= 12 g/mol
What is the molar mass of H2O
18 g/mol
Ask students to write down the answers
TED ed mole

12. Percent Composition
The percentage by mass of each element in a compound
Equation:
Mass of element x 100 = % comp. Total mass

13. Examples What is the percent composition of oxygen in Al2O3?
What is the percent composition of each element in acetic acid C2H4O2
% composition C =
% composition H =
% composition O =
Acetic acid in fruit

14. Mole Project (10 points)
Individual Project Due Next Class -Create a “mole” theme poster -Hand drawn and Color -Include a 3 key terms from today’s note. Example theme: Moleo and Juliet Molethello Guacamole Moledamort Moleius Caesar Whack-a-moley Angry Mole Pepto Bismole Pikamole InstaMole
Don’t do Molester

15. Assignments
Summary: What is a mole? How is a molar mass different from atomic mass?
TURN IN LAB
Dec 15 – last day to make up absent work
Dec 15 – last extra credit due Canvas
Dec 15 – deadline for online HW redo & quiz retake

16. Homeroom
One-on-One grade check
Quote of the week

17. Final Exam Schedule
December 19 - Period 1 & Period 3   December 20 - Period 2 & Period 4   December 21 - Period 5 & Period 6