1. March 2, 2015 Warm up Write the formula for Iron (III) Oxide
Turn in any late work
Pick up daily handouts, turned back docs, white board & calculator
Warm up
Write the formula for Iron (III) Oxide
How many grams are in 1.505x 10^23 atoms of Iron(III) Oxide ?

2. Homework 3-2
Book Work pg 378 – , 55, 56 ( a & b), 61 Due Wednesday

3. Important Dates
Monday 3-2 – Smore Chemistry Tuesday 3-3 – ACT (homeroom) Wednesday 3-4 – Demo / Reaction Stoich Thursday 3-5 – Quiz / Composition Stoich Friday 3-6 – Reaction Stoich / Mole Ratio

4. Today is March 2, 2015 Topic: The Mole and Metrics
Lesson Objectives: SWBAT
2.2.4 Analyze Stoichiometric relationships inherent in a chemical reaction
2.2.5 Analyze quantitatively the composition of a substance (empirical formula, molecular formula, percent composition, and hydrates)
Essential Question: 2.2 Analyze chemical reactions in terms of quantities, product formation, and energy.

5. Agenda 3-2 Do Now Mole Ratios Smore Chemistry
Stoichiometry Introduction
Agenda 3-2

6. Mole Ratios

7. Mole-Mole Factor
Shows the mole-to-mole ratio between two of the substances in a balanced equation
Derived from the coefficients of any two substances in the equation

8. Writing Mole Factors 4 Fe + 3 O2 2 Fe2O3 Fe and O2
4 mol Fe and 3 mol O2
3 mol O mol Fe
Fe and Fe2O3
4 mol Fe and 2 mol Fe2O3
2 mol Fe2O mol Fe

9. 4 Fe + 3 O2 2 Fe2O3 O2 and Fe2O3 3 mol O2 and 2 mol Fe2O3
2 mol Fe2O mol O2
4 Fe O Fe2O3
Pg 33

10. A. A mol factor for H2 and N2 is
3 H2(g) N2(g) NH3(g)
A. A mol factor for H2 and N2 is
1) 3 mol N ) 1 mol N ) 1 mol N2
1 mol H mol H mol H2
B. A mol factor for NH3 and H2 is
1) 1 mol H ) 2 mol NH ) 3 mol N2
2 mol NH mol H mol NH3

11. http://bit.ly/1CfjFBn Follow the QR Code / link to find groups
Sit in your groups and wait for further instructions – sit around one table so it is easy to tell where the groups are

12. Smore’s Lab Volume of 1 (I should be able to hear the music)
To get a SMORE all work must be completed with a stamp
Smore’s Lab

13. Stoichiometry Island

14. Learning Check 1 4 Fe + 3 O2 2 Fe2O3
How many moles of Fe2O3 are produced when 6.0 moles O2 react?
Pg 33

15. Learning Check 2 4 Fe + 3 O2 2 Fe2O3
How many moles of Fe are needed to react with 12.0 mol of O2?

16. What’s the empirical formula of a molecule containing 65. 5% carbon, 5
What’s the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen?
Empirical Practice

17. Molecular Formula Practice
If the molar mass of the compound in problem 1 is 110 grams/mole, what’s the molecular formula?
Molecular Formula Practice

18. What’s the empirical formula of a molecule containing 18
What’s the empirical formula of a molecule containing 18.7% lithium, 16.3% carbon, and 65.0% oxygen?
Empirical Practice

19. Molecular Formula Practice
If the molar mass of the compound in problem 3 is 73.8 grams/mole, what’s the molecular formula?
Molecular Formula Practice

20. Crime Scene Investigation
Working in groups of 4 complete the investigation and figure out who killed Tony Lemoy by calculating empirical and molecular formula
Complete for HW if needed
Crime Scene Investigation