1. Warm Ups- The Mole
January 10-January 20

2. Tuesday, January 10, 2017
Each school year is 180 days. You are in school 430 minutes per day. How many hours will you spend in class at Lakeside High per school year? We will assume you have perfect attendance.

3. Wednesday, January 11, 2017
Calculate the Molar Mass of Calcium phosphate, Ca3(PO4)2?
How many moles are there in 5.64 x 1024 formula units of Calcium chloride, CaCl2?

4. Homework Check Tuesday Night 1/10/2017
Atoms to Moles Conversions
a) g/mol c) g/mol
b) g/mol d) g/mol
a) 1.66 x 1024 atoms Al
b) 2.18 x 1024 formula units NaCl
a) 2.49 x mol Pb
b) 6.06 mol H2O

5. Thursday, January 12, 2017
-How many grams are in 3.67 moles of BaCl2? -How many moles are in grams of Mg3(PO4)2?

6. Friday, January 13, 2017
-How many grams are in 7.89 x 1022 molecules of H2O?

7. Tuesday, January 17, 2017
-How many formula units are in g of Ba3(PO4)2?

8. Wednesday, January 18, 2017
Determine the empirical formula for the compound whose percent composition is shown below.

9. Homework Check Tuesday Night 1/17/2017
% Composition:
32.37 % Na
CO(NH2)2:: % N, 6.73% H NH3: 82.22% N, 17.78% H
35.00% N, 59.96% O
56.22% Ba, 29.03% Cl, 14.75% H2O
66.71% C, 11.03% Cu, 2.81% H, % N
51.17% H2O
69.94% Fe, 30.06% O
93.10 % Ag, 6.90% O
28.71% K, 0.74% H, % S, 47.00% O
Empirical Formula:
Na2S
Fe2S3
P2O5
Na2SO3
FeS
Na2SO4
K2Cr2O7
CaBr2
PbC8H20

10. Thursday, January 19, 2017
A compound was found to contain g of carbon and g of hydrogen. The molar mass of the compound is g/mol. Determine the molecular formula.

11. Homework Check Wednesday Night 1/18/2017
Molecular Formula:
P4O10
H2O2
O3C3N3Cl3
N2O5
N2H4

12. Friday, January 20, 2017
Analysis of a chemical used in photographic developing fluid yielded the percent composition data shown in the circle graph. If the chemical’s molar mass is g/mol, what is its molecular formula?