Th-1/27- Stoichiometry

1. Grabbed 2 Sandwich Stoichiometry pages and 1 formulas review page in beginning of class
2. We reviewed Molly's blog
3. We went over Mol Stations Calculations from Wednesday's lab
Number 3 from Set 2 - # of moles in Aluminum foil
1.00 g Al x 1 mol Al
---------- = .0371 mol Al
26.98 g Al
Numbers 2 and 3 from Set 4- # of moles of Krypton in our graduated cylinder

2.7 x 10^14atom Kr 1 mol Kr
x --------- =4.5 x 10^-10 mol Kr
6.02 x 10^23 atoms Kr

Mass of Krypton in our graduated cylinder
2.7 x 10^14atom Kr 1 mol Kr 83.78 g Kr
x --------- x ------------- = 3.8 x 10^-8 g Kr
6.02 x 10^23 atoms Kr 1 mol Kr

4. Took and graded first mole quiz( if you go to the TLC and review mole island concept by next Thursday you can retake the quiz for full credit)
5. Began Sandwich Stoichiometry notes
1. 4 slices of cheese
2. 6 slices of bread
3. 2.5 sandwiches
4. 3 sandwiches, cheese used up, 1 bread left over
6. Homework- Journal Page 7