1 / 25

Unit 5 Topic1 The Mole

Unit 5 Topic1 The Mole. Collection Terms. 1 trio = 3 singers 1 six-pack Cola = 6 cans Cola drink 1 dozen donuts = 12 donuts 1 gross of pencils = 144 pencils. A Moles of Particles. Contains 6.02 x 10 23 (Avogadro’s number)particles 1 mole C = 6.02 x 10 23 C atoms

kreeli
Download Presentation

Unit 5 Topic1 The Mole

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Unit 5 Topic1 The Mole

  2. Collection Terms 1 trio = 3 singers 1 six-pack Cola = 6 cans Cola drink 1 dozen donuts = 12 donuts 1 gross of pencils = 144 pencils

  3. A Moles of Particles Contains 6.02 x 1023 (Avogadro’s number)particles 1 mole C = 6.02 x 1023 C atoms 1 mole H2O = 6.02 x 1023H2O molecules 1 mole NaCl = 6.02 x 1023NaCl = 6.02 x 1023 Na+ ions and 6.02 x 1023Cl– ions

  4. Examples of Moles Moles of elements 1 mole Mg = 6.02 x 1023 Mg atoms 1 mole Au = 6.02 x 1023 Au atoms Moles of compounds 1 mole NH3 = 6.02 x 1023 NH3 molecules 1 mole C9H8O4 = 6.02 x 1023aspirin molecules

  5. Ratio to use in unit conversion 6.02 x 1023 particles 1 mole or 1 mole 6.02 x 1023 particles

  6. Learning Check 1. Number of atoms in 0.500 mole of Al 1) 500 Al atoms 2) 6.02 x 1023 Al atoms 3) 3.01 x 1023 Alatoms 2.Number of moles of S in 1.8 x 1024 S atoms 1) 1.0 mole S atoms 2) 3.0 mole S atoms 3) 1.1 x 1048 mole S atoms

  7. Solution 1. Number of atoms in 0.500 mol of Al 3) 3.01 x 1023 Alatoms 0.500 mol Al 6.02 x 1023 Al atoms 1 mol Al 2. Number of moles of S if a sample of S contains 4.50 x 1024 S atoms 2) 3.0 mole S atoms 4.50 x 1024 S atoms 1 mol S 6.02 x 1023 S atoms

  8. Practice Problems-R side 1. How many atoms are in 2.5 mol Zn? 2. How many molecules are in 0.7 mole water? 3. How many moles are in 5.75x10 24 atoms of Al? 4. How many moles are in 2.50x10 20 atoms of Fe?

  9. Unit 5 topic 2Mole and molar mass conversion

  10. Molar Mass • Number of grams in 1 mole • Equal to the atomic mass from the periodic table. Just add the unit “gram.” Mass of One C atom = 12.0 amu Mass of 1 mole of C atoms = 6.02 X 10 23 C atoms = 12.0 g

  11. Learning Check A. 1 mole of Br atoms = ________gram B. 1 mole of Sn atoms = ________gram

  12. Molar Mass of Compounds 1 mole of CaCl2 (1 Ca x 40.1 g + 2 Clx 35.5 g) = 111.1 g/mole 1 mole of N2O4 (2 moles N x 14.0 g/mole + 4 moles O x 16.0 g/mole )= 92.0 g/mole

  13. Learning Check-R side A.1 mole of K2O = ______g B. 1 mole of antacid Al(OH)3 = ______g

  14. Solution A.1 mole of K2O = 94.2 g 2 K x 39.1 g/mole + 1 O x 16.0 g/mole B. 1 mole of antacid Al(OH)3= 78.0 g 1 Al x 27.0 g/mole + 3 O x 16.0 g/mole + 3 x 1.01

  15. Learning Check Prozac, C17H18F3NO, is a widely used antidepressant that inhibits the uptake of serotonin by the brain. It has a molar mass of 1) 40.0 g/mole 2) 262 g/mole 3) 309 g/mole

  16. Solution Prozac, C17H18F3NO, is a widely used antidepressant that inhibits the uptake of serotonin by the brain. It has a molar mass of 3) 309 g/mole 17C (12.0) + 18H (1.01) + 3F (19.0) + 1N (14.0) + 1 O (16.0)

  17. Ratio to use in unit conversion Molar mass (gram) 1mole or 1 mole molar mass (gram)

  18. Molar mass (gram) 6.02 x 1023 Particles or 6.02 x 1023particles Molar Mass(gram)

  19. Learning Check Acetic acid CH3COOH is the acid in vinegar . It has a molar mass of 60.0 g/mole. 1 mole of acetic acid = ____________ 1 mole acetic acid or g acetic acid g acetic acid 1 mole acetic acid

  20. Solution Acetic acid CH3COOH is the acid in vinegar . It has a molar mass of 60.0 g/mole. 1 mole of acetic acid = 60.0 g acetic acid 1 mole acetic acid or 60.0 g acetic acid 60.0 g acetic acid 1 mole acetic acid

  21. Moles and Grams Aluminum is often used for the structure of light-weight bicycle frames. How many grams of Al are in 3.00 moles of Al? 3.00 moles Al ? g Al

  22. 1. Molar mass of Al 1 mole Al = 27.0 g Al 3. Setup 3.00 moles Al 27.0 g Al 1 mole Al Answer = 81.0 g Al

  23. Learning Check The artificial sweetener aspartame (Nutri-Sweet) formula C14H18N2O5is used to sweeten diet foods, coffee and soft drinks. How many moles of aspartame are present in 225 g of aspartame?

  24. Solution 1. Molar mass of Aspartame C14H18N2O5 (14 x 12.0) + (18 x 1.01) + (2 x 14.0) + (5 x 16.0) = 294 g/mole 1mole of aspartame = 294 g aspartame 2. Setup 225 g aspartame 1 mole aspartame 294 g aspartame = 0.765 mole aspartame

  25. Methane CH4known as natural gas is used in gas cook tops and gas heaters. How many grams are in 2.3 x 10 12 molecules of methane?

More Related