Section 10.2 lecture (part A) for Honors & Prep Chemistry

2. Converting between moles and number of particles involves multiplying or dividing by 6.02 x 10 23

3. Converting between moles and mass involves multiplying or dividing by the molar mass of the substance

4. Convert from moles to mass How much does 3.75 moles of magnesium metal weigh?

5. Convert from moles to mass How much does 3.75 moles of magnesium metal weigh? 3.75 moles Mg

6. Convert from moles to mass How much does 3.75 moles of magnesium metal weigh? 3.75 moles Mg X

7. Convert from moles to mass How much does 3.75 moles of magnesium metal weigh? 3.75 moles Mg X 24.305 grams 1 mole Mg

8. Convert from moles to mass How much does 3.75 moles of magnesium metal weigh? 3.75 moles Mg X 24.305 grams 1 mole Mg = 91.1 grams Mg

9. Convert from moles to mass How much does 3.75 moles of magnesium metal weigh? 3.75 moles Mg X 24.305 grams 1 mole Mg = 91.1 grams Mg WHERE THE HECK DID THIS COME FROM?!?

10. Convert from moles to mass How much does 3.75 moles of magnesium metal weigh? 3.75 moles Mg X 24.305 grams 1 mole Mg = 91.1 grams Mg WHERE THE HECK DID THIS COME FROM?!?  The periodic table!

11. 10.5 Moles to grams 9.45 mol Al 2 O 3 x ___________ = 964g Al 2 O 3 1 mol Al 2 O 3 102g Al 2 O 3 2 Al = 54g 3 O = 48 g 102g

12. Grams to moles

16. Mole Review huge # of particles  6 x 10 23  6 x 10 23 (g) grams (mass) molar mass molar mass   Use the periodic table! Use the mole banner!