1. Chicago “Black Sox” Scandal (1909)
Reading:
Chapter 2 sections 5-8 AGAIN
Mastering Chemistry #7 – Due Monday by 11:59PM
Chapter 2 #’s 7,8, (55-66 all)*
* = may not match back of book

2. POP QUIZ!!!!

3. 1) chlorous acid
3) H2S(aq)
2) Zn3P2
4) Mn(CO3)2

4. Sig. Figs. in Calculations
Two rules:
#1) Multiplication and Division:
The value in the calculation that has the FEWEST number of sig. figs. determines the number of sig. figs. in your answer.
#2) Addition and Subtraction:
The value in the calculation that has the FEWEST decimal spots determines the number of decimal spots in your answer.

5. Mixed Operations with sig. figs.
1) Do inside parenthesis first
2) Mark the last significant digit you are going to keep in that step
3) Finish calculations
4) Report answer to correct number of sig. figs.
4 sig. figs.  
5 sig. figs.

6. Mixed Operations with sig. figs.
1) Do inside parenthesis first
2) Mark the last significant digit you are going to keep in that step
3) Finish calculations
2 sig. figs.
6 sig. figs.
4) Report answer to correct number of sig. figs.  
x106 
-1.5x106

7. Mixed Operations with sig. figs.
1) Do inside parenthesis first
2) Mark the last significant digit you are going to keep in that step
2 sig. figs.
3) Finish calculations
4 sig. figs.
4) Report answer to correct number of sig. figs.  
3 sig. figs.
or 3.06x10-4 
7 sig. figs.