1. Bellwork
Jake has a jar full of sodium hydrogen carbonate, or baking soda (NaHCO3). What is the mass of 2.78 mol baking soda?

2. CHAPTER 7 THE MOLE Part 3

3. Percent Composition (remember: percent = part divided by total x 100) percent by mass of each element in a compound

4. Find the % composition for a compound that is formed from 28
Find the % composition for a compound that is formed from 28.0 g of Fe and 8.0 g O.

5. 28.0 g Fe + 8.0 g O = 36.0 g total 28.0 g Fe x 100 = 77.8 % Fe
Find the % composition for a compound that is formed from 28.0 g of Fe and 8.0 g O.
28.0 g Fe g O = g total
28.0 g Fe x = % Fe
36.0g total
8.0 g O x = % O

6. Why is Avogadro so rich!
Because he is a multi-mole-ionairre!!!!

7. What is the percent composition of calcium acetate?
Ca(C2H3O2)2

8. What is the percent composition of calcium acetate?
Ca(C2H3O2)2
Ca 1 x 40.1 = 40.1
C 4 x 12.0 = 48.0
H 6 x = 6.0
O 4 x 16.0= 64.0
158.1 g
( /158.1g) x 100 =25.4% Ca
( /158.1g) x 100 =30.4% C
( / 158.1g) x 100 = 3.8% H
( /158.1g) x 100 = 40.5% O
100.1%