1. The Mole Diagram Objective: Learn how to use visual aides to do conversions.

2. Think of the mole as equal to two things 1.00 mole CO 2 = _________ g CO 2 1.00 mole CO 2 = _________ g CO 2 1.00 mole CO 2 = __________molecules 1.00 mole CO 2 = __________molecules

3. Now suppose you have 88.0 grams of CO 2 Now suppose you have 88.0 grams of CO 2 Use the diagram to convert to molecules. Use the diagram to convert to molecules.

4. Now use the diagram to find the grams of CO 2 in 3.0 x 10 23 molecules of CO 2 Now use the diagram to find the grams of CO 2 in 3.0 x 10 23 molecules of CO 2

5. Sulfur Trioxide Set up a diagram to convert 30g of Sulfur trioxide to molecules Set up a diagram to convert 30g of Sulfur trioxide to molecules 30 grams to molecules 30 grams to molecules

6. The mole is equal to three things At STP one mole of any gas has a volume of 22.4 liters. At STP one mole of any gas has a volume of 22.4 liters. STP stands for Standard Temperature Pressure STP stands for Standard Temperature Pressure T = 0 o C or 273 K P = 1.0 atmosphere T = 0 o C or 273 K P = 1.0 atmosphere 14. 7 psi 14. 7 psi

7. The Volume of one mole of GAS is equal to 22.4 liters @STP The volume of one mole of iron is not equal to 22.4 liters @STP because iron is not a gas. The volume of one mole of iron is not equal to 22.4 liters @STP because iron is not a gas. The volume of one mole of oxygen @STP is equal to 22.4 liters because oxygen is a gas. The volume of one mole of oxygen @STP is equal to 22.4 liters because oxygen is a gas.

8. Pick the ones that have a molar volume = 22.4 Liters Which of the elements below would have a molar volume equal to 22.4 liters @ STP? Which of the elements below would have a molar volume equal to 22.4 liters @ STP? Fe C N 2 Cl 2 S He Fe C N 2 Cl 2 S He

9. So a mole diagram for a gas looks like this So a mole diagram for a gas looks like this With one thing added With one thing added

10. Use the diagram to find the volume of 7.0 grams of nitrogen Use the diagram to find the volume of 7.0 grams of nitrogen

11. HW #20 Page 188 Calculate the molar mass for each of the following substances. a. barium perchlorate d. copper(II) nitrate b. magnesium sulfate e. tin(IV) chloride c. lead(II) chloride f. phenol, C6H6O

12. #21 Change the 49.2 mg to 49.2 grams. Change the 49.2 mg to 49.2 grams. SO 3 = 80 grams for one mole. SO 3 = 80 grams for one mole. (49.2/ 80) = 0.614 moles (49.2/ 80) = 0.614 moles Calculate the number of moles of the indicated substance in each of the following samples. a. 49.2 mg of sulfur trioxide b. 7.44 104 kg of lead(IV) oxide c. 59.1 g of chloroform, CHCl3 d. 3.27 g of trichloroethane, C2H3Cl3 e. 4.01 g of lithium hydroxide