1. Percent Composition Stoichiometry February 5, 2018
Learning Target: I can formulate and calculate percent composition of molecules

2. Do Now (4 min) How many H’s are in H2O? How many H’s are in (NH4)2SO4?
February 5, 2018
Learning target: I can formulate and calculate percent composition of molecules
Do Now: (Answer on your Do Now Sheet)
How many H’s are in H2O?
How many H’s are in (NH4)2SO4?
Learning Target: I can formulate and calculate percent composition of molecules

3. Announcement Between now and February 15 (Thurs): 1 pop quiz left!
Stoichiometry exam: Thursday, February 15th
Lab 13: Hydrates – WEDNESDAY!!! February 7th
Learning Target: I can formulate and calculate percent composition of molecules

4. Part A: Molar mass of Compounds
February 5, 2018
Part A: Molar mass of Compounds
2 minutes: Calculate the Molar Mass:
a) SiF4 ________________
B) KOH _________________
C2H6 __________________
d) Ca(NH4)2 __________________
Learning Target: I can formulate and calculate percent composition of molecules

5. Part B: Percent composition
February 5, 2018
Part B: Percent composition
Chemistry reference table: Table T % 𝑐𝑜𝑚𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛 𝑏𝑦 𝑚𝑎𝑠𝑠= 𝑚𝑎𝑠𝑠 𝑜𝑓 𝑝𝑎𝑟𝑡 𝑚𝑎𝑠𝑠 𝑜𝑓 𝑤ℎ𝑜𝑙𝑒 ∗100
Composed of:
33% sugar
33% spice
33% everything nice
Learning Target: I can formulate and calculate percent composition of molecules

6. Part B: Percent composition
February 5, 2018
Part B: Percent composition
2 minutes: Solve: 2 a – c A) what is the mass of just the H’s in CH4 : _______________________ B) what is the mass of just the O’s in CO2 : ______________________ C) what is the mass of just the H’s in (NH4)2S : ____________________
Learning Target: I can formulate and calculate percent composition of molecules

7. Part C: Percent Composition Calculations
February 5, 2018
Part C: Percent Composition Calculations
Calculate the percent composition of carbon for the following compounds. A) CaCO3 % 𝑐𝑜𝑚𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛 𝑏𝑦 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶= 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶𝑎𝐶𝑂3 ∗100 % 𝑐𝑜𝑚𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛 𝑏𝑦 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶= 𝑔 100 𝑔 ∗100=12% 𝐶
Learning Target: I can formulate and calculate percent composition of molecules

8. Part C: Percent Composition Calculations
February 5, 2018
Part C: Percent Composition Calculations
Calculate the percent composition of carbon for the following compounds. B) CH4 % 𝑐𝑜𝑚𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛 𝑏𝑦 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶= 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶𝐻4 ∗100 % 𝑐𝑜𝑚𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛 𝑏𝑦 𝑚𝑎𝑠𝑠 𝑜𝑓 𝐶= ∗100=_____________ % 𝐶
Learning Target: I can formulate and calculate percent composition of molecules

9. Part C: Percent Composition Calculations
February 5, 2018
Part C: Percent Composition Calculations
Calculate the percent composition of carbon for the following compounds.
Sn(CO3) d) C2H4
* Complete question 4 if you finish early!!!
Learning Target: I can formulate and calculate percent composition of molecules

10. Part C: Percent Composition Calculations
February 5, 2018
Part C: Percent Composition Calculations
Calculate the percent composition for each element in C6H12O6 glucose.
Learning Target: I can formulate and calculate percent composition of molecules

11. February 5, 2018
Exit ticket (3 min)
EXIT TICKET: complete on a separate sheet of paper:
What is the percent composition of each element in in FeCl3?
Learning Target: I can formulate and calculate percent composition of molecules