1. Bell Ringer Have the following on your desk: Bubble Gum Lab
Percent Composition HW
On left side in class notebook: What is the percent by mass of oxygen in calcium phosphate? (number 3)

2. Day
Topic HW
Monday
11/10
-Empirical/Molecular Formula
-Flight 1023
-Empirical & Molecular WS due Wed
Tuesday
11/11
-Go over molar conversions quiz
-Finish flight 1023 class data
-Study for comp quiz
-Flight 1023 due tom
Wednesday
11/12
-Comprehensive quiz over Unit 5 (naming, formulas, molar conversions, % comp, EF, MF)
-review for test
Thursday
11/13
-Go over comp quiz
-Review for Unit 5
Friday
11/14
-Test over Unit 5
TBD

3. Bubble Gum Lab Results
Turn in Bubble Gum Lab & Percent Composition WS to special seats 1 & 14

4. Empirical Formula
#1 & 2 on “Empirical & Molecular Formulas” WS

5. HO H2O2 Molecular Formula
“True Formula” - the actual number of atoms in a compound HO
empirical
formula ?
H2O2
molecular
formula

6. Molecular Formula— you must know/be given the molar mass of the molecule
1. Find the empirical formula.
2. Find the molar mass of the empirical formula.
3. Divide the molecular mass (given) by the empirical mass.
4. Multiply each subscript in the empirical formula by the answer from step 3.

7. (CH2)2  C2H4 Molecular Formula empirical mass = 14.027 g/mol
The empirical formula for ethylene is CH2. Find the molecular formula if the molecular mass is 28.1 g/mol?
empirical mass = g/mol
28.1 g/mol
g/mol
= 2.00
(CH2)2  C2H4

8. EF/MF WS
#3, practice with #4&5

9. Flight 1023

10. Flight 1023 – store in Individual classroom folder tonight Work on Passengers in Group: Report Empirical Formula w/ Calculation & Name to Teacher