1. How many seconds are in 2 years?
Warm-up
How many seconds are in 2 years?
Today you will need a calculator, a periodic table, and your polyatomic ion sheet.
*REMEMBER YOUR SIGNIFICANT FIGURES RULES!!!

2. Notes 5.1 Moles

3. Moles 6.022×1023 Particles 1mol = 22.4L @ STP 1mol = Molar Mass
The mass of 1 mole of a substance in grams (also known as Gram Atomic Mass)
Mass given on periodic table is in amu
Because amu and grams are relative we can say the masses on the periodic table are in grams

4. Hydrates
Ionic compound that has water incorporated into its crystal structure
Written as MgCl2●6H2O
Calculate the GAM for this hydrate
Mg: 1 x =
Cl: 2 x = 70.90
H: 12 x =
O: 6 x = g
Anhydrous
CoCl2
CoCl2●6H2O

5. Sample Problem
To carry out a chemical reaction you need 3.20 moles of zinc nitrate (Zn(NO3)2). What is the mass of 3.20 moles of Zn(NO3)2?

6. What is the mass of 3.20 moles of Zn(NO3)2?

7. *REMEMBER TO USE CORRECT SIG FIGS!!!
Sample Problem
How many moles are in 17.7 g of  KMnO4?
How many formula units are in g  KMnO4?
How many atoms of O are in g  KMnO4?
*REMEMBER TO USE CORRECT SIG FIGS!!!

8. How many moles are in 17.7 g of KMnO4?

9. Sample Problem *REMEMBER TO USE CORRECT SIG FIGS!!!
4. How many moles are in 41.2 g of  Mg3(PO4)2?
5. How many formula units are in 41.2 g  Mg3(PO4)2?
6. How many atoms of P are in 41.2 g  Mg3(PO4)2?
*REMEMBER TO USE CORRECT SIG FIGS!!!

10. Hydrates
Ionic compound that has water incorporated into its crystal structure
Written as MgCl2●6H2O
Calculate the GAM for this hydrate
Mg: 1 x =
Cl: 2 x = 70.90
H: 12 x =
O: 6 x = g
Anhydrous
CoCl2
CoCl2●6H2O