1. Two Relationships
1 mole = molar mass in grams of any element or compound (use periodic table)
1 mole = x 1023 particles (molecules, atoms, formula units)
Put these relationships on the back of your periodic table.

2. Each group of two will need a small whiteboard and marker.
One eraser per table

3. How many molecules are in 4 moles of C6H12O6?
How many moles of Mg are in 3.01 x 1022 atoms of Mg?
What is the mass in grams of .720 mol Be?
How many moles of NaCl are in a g sample?
How many moles are in 32L of CO2 at STP?
How many liters are in 5.2 moles of water vapor?

4. Calculating the Volume and Moles of a Gas at STP
STP-Standard Temperature and Pressure
0⁰C and 1 atm
Only deals with gases
1 mole of a gas occupies a volume of 22.4 L
1 mole = 22.4 L
Called molar volume of a gas

5. Example Problems
1. When carbon dioxide is at STP what would be the volume of moles of that carbon dioxide gas? 2. At STP, how moles of sulfur dioxide gas are in 67.2 Liters? 3. What is the volume of 3.70 moles of nitrogen gas at STP? 4. If .880 L of He gas is at STP how many moles would make up that volume of gas?

6. Multi-Step Problems
Determine what you are given and what you are trying to find.
Are they directly related?
Can you convert from one unit to another using one of the three relationships
If not, how can we connect them?
The mole!
We will need to use multiple relationships-multiple steps
Using the mole to connect them

7. Answer the following questions :
How many atoms are in .360 mol of Aluminum?
How many moles are in g of potassium nitrate?
How many formula units are in 4.65 g of sodium chloride?
How many grams are 9.64 x 1023 atoms of Copper?
How many formula units are in moles of MgCl2?
How many grams of lead is 9.3 x 1015 atoms of lead?
What is the volume of 2.63 x 1025 molecules of carbon dioxide STP.
How many atoms are in grams of ethane, C2H6?

8. How many grams of lead is 9.3 x 1015 atoms of lead?
2. What is the volume of 2.63 x 1025 molecules of carbon dioxide STP.

9. Answer the Following questions in your notebook
How many liters of Fluorine STP are in .365 grams?
How many atoms are in 82.0 g of Kr?
How many formula units are in 2.73 moles of CaCl2?
How many grams of Iron (III) oxide is 9.3 x 1017 molecules?