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Week 21 Chemistry

Week 21 Chemistry. Mole Conversions, Molar Mass, Percent Composition. Write the Learning Target. Warm Up: 4 Minutes. Stay in your own seat. You should be working SILENTLY. How many molecules are in 2.0 moles of Carbon Dioxide?. Hint: 1 mole = _______ particles?. Agenda.

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Week 21 Chemistry

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  1. Week 21 Chemistry Mole Conversions, Molar Mass, Percent Composition

  2. Write the Learning Target Warm Up: 4 Minutes Stay in your own seat You should be working SILENTLY How many molecules are in 2.0 moles of Carbon Dioxide? Hint: 1 mole = _______ particles?

  3. Agenda • Warm Up: 7 Minutes • Notes/Examples: 15 minutes • Guided Practice: 12 minutes • Independent Practice: 15 minutes • Closing: 4 Minutes

  4. Goal For Today One Step Mole Calculations

  5. Review of Types of Particles Single Element  Covalent Compound  Ionic Compound  Atom Molecules Formula Unit

  6. Conversion Factor of the Day

  7. Requirements of Mole Calculations • Identify the given quantity, unit, and element (or compound). • Identify the unknown quantity, unit, and element (or compound). • Identify the relationship(s) between the given unit and the unknown unit.

  8. Example 1 How many atoms does 12.0 moles of He represent?

  9. Example 2 How many moles does 1.1 x 1021 molecules of Carbon Dioxide (CO2)represent?

  10. Example 3 How many formula units are in 5.1 moles of Calcium Hydroxide, Ca(OH)2?

  11. Guided Practice Expectations • As Mr. Ghosh projects the question, silently read the question. (17 seconds) • When Mr. Ghosh calls Team, discuss with your teammates to solve the question correctly. (81 seconds) • Be ready to share your response when Mr. Ghosh calls SWAG.

  12. #1 How many molecules are in 0.723 moles of Dihydrogen Monoxide, H2O?

  13. #2 How many moles are in 2.3 x 1025 formula units of Potassium Permanganate, KMnO4?

  14. #3 How many manganese atoms are in 4.2 x 10-5 moles of Mn, manganese?

  15. Independent Practice 85% Practice makes Perfect

  16. Closing • What relationships are necessary to perform mole calculations?

  17. Write the Learning Target Warm Up: 4 Minutes Stay in your own seat You should be working SILENTLY How many moles are in 6.42 x 1028 atoms of gold? No more than 4 people per row

  18. Agenda • Warm Up: 7 Minutes • Expectations for Stations: 4 minutes • Stations Review: 40 minutes • Closing: 2 Minutes

  19. How Will Stations Work?? • You will be placed with a group of other scholars to complete four stations on the following topics: • Station 1: Mole Calculations • Station 2: Writing Formulas • Station 3: Writing Names of Compounds • Station 4: Quantifying Atoms and Ions in Molecules and Formula Units • You Need: • Periodic Table • Notes

  20. How Will Stations Work?? • You will spend10 minutes at each station working each problem as a group on scratch paper. • You will write your FINAL answer on the answer document. • When time is called, you will leave your current station and move on to the next station • You will have 10 seconds to move to the next station

  21. Closing • Why did we review these concepts? • Why is it important that everybody master these objectives?

  22. About your seats • Seats were chosen to help you focus and succeed in class • Grades and behavior were factors • You must sit in your assigned seat every day • If not, I will mark you absent • You may NEVERmove the seats around. Seats are arranged to make sure everyone can see the board

  23. Write the Learning Target Warm Up: 4 Minutes Stay in your own seat You should be working SILENTLY How many molecules are in 2.0 moles of Carbon Dioxide (CO2)? How many oxygen atoms are in one molecule of Carbon Dioxide (CO2)?

  24. Agenda • Seating Chart: 3 minutes • Warm Up: 7 Minutes • Notes/Examples: 15 minutes • Guided Practice: 12 minutes • Independent Practice: 12 minutes • Closing: 4 Minutes

  25. The Warm-up… So what if I asked you how many oxygen atoms were in 2 moles of Carbon Dioxide (CO2)? How would you do it?

  26. Question… What is 2 x 3? What is 6 x 4? What is 2 x 3 x 4? 6 24 How did we do this? 24

  27. Goal For Today Multi Step Mole Calculations

  28. Relationships between particles Covalent Compounds (Molecules) are made of atoms Ionic Compounds (Formula Units) are made of ions Example: CO2 3 atoms Example: NO 2 atoms Example: BaCl2 3 ions Example: ZnSO4 2 ions Polyatomic Ion

  29. Reminder: Requirements of Mole Calculations • Identify the given quantity, unit, and element (or compound). • Identify the unknown quantity, unit, and element (or compound). • Identify the relationship(s) between the given unit and the unknown unit.

  30. Example 1 How many atoms does 12.0 moles of Sulfur Dioxide (SO2) represent?

  31. Example 2 How many hydroxide ions are in 5.1 moles of Calcium Hydroxide, Ca(OH)2?

  32. Guided Practice Expectations • As Mr. Ghosh projects the question, silently read the question. (17 seconds) • When Mr. Ghosh calls Team, discuss with your teammates to solve the question correctly. (81 seconds) • Be ready to share your response when Mr. Ghosh calls SWAG.

  33. #1 How many ions are in 2.3 formula units of Potassium Permanganate, KMnO4?

  34. #2 How many oxygen atoms are in 0.723 moles of Dihydrogen Monoxide, H2O?

  35. #3 How many zinc ions are in 4.2 x 10-5 moles of Zinc Chloride (ZnCl2)?

  36. Independent Practice 85% Practice makes Perfect

  37. Closing • What relationships are necessary to perform mole calculations?

  38. Write the Learning Target Warm Up: 4 Minutes Stay in your own seat You should be working SILENTLY

  39. Agenda • Warm Up: 7 Minutes • Notes/Examples: 13 minutes • Guided Practice: 10 minutes • Independent Practice: 13 minutes • Closing: 2 Minutes

  40. What is Molar Mass? The mass (in grams) of one mole of the substance

  41. Units for Molar Mass g/mol Read as “grams per mole”

  42. How to find the Molar Mass of a Compound? For the compound XaYbZc Use this formula Molar Mass = a(Atomic Mass X ) + b( Atomic Mass Y ) + c(Atomic Mass Z)

  43. Example 1: Calculate the Molar Mass ofNaBr

  44. Example 2: Calculate the Molar Mass of C6H12O6.

  45. Example 3: Calculate the Molar Mass of Al2(SO4)3

  46. Expectations for Guided Practice Take the first 13 seconds to write the chemical formula or name. With your shoulder partner, take 61 seconds to find the molar mass. When Mr. Ghosh calls SWAG, be ready to share your answers out loud.

  47. Guided Practice #1 Calculate the Molar Mass ofAgF2 145.864 g/ mol

  48. Guided Practice #2 Calculate the Molar Mass ofCalcium Nitrate. Ca(NO3)2 164.086g/ mol

  49. Guided Practice #3 Calculate the Molar Mass of Tetracarbon Trioxide. C4O3 96.041 g/mol

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