1 / 9

Dozen and Mole

Dozen and Mole. 1 mole = 6.02 x 10 23 particles ½ mole of C atoms = 3.01 x 10 23 C atoms 2 moles of H 2 O molecules = 1.20 x 10 24 H 2 O molecules. 1 dozen = 12 pieces 1/2 dozen of apples = 6 apples 2 dozens of eggs = 24 eggs. Mole.

smonte
Download Presentation

Dozen and 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. Dozen and Mole 1 mole = 6.02 x 1023 particles ½ mole of C atoms = 3.01 x 1023 C atoms 2 moles of H2O molecules = 1.20 x 1024 H2O molecules 1 dozen = 12 pieces 1/2 dozen of apples = 6 apples 2 dozens of eggs = 24 eggs

  2. Mole • amount of substance containing the same number of particles as 12 g of C-12. • 1 mole contains 6.02 x 1023 particles (Avogadro’s number) Particles – may be atoms, molecules, ions

  3. Mole and Number of Particles • 1 mole of any substance contains 6.02 x 1023 particles (atoms, molecules, ions) 1 mole C-12 6.02 x 1023 atoms 1 mole CO2 6.02 x 1023 molecules

  4. Mole – Number of Particles Conversion x 6.02 x 1023 particles/mole Mole Number of Particles Sample Problem 1: How many molecules are there in 0.25 moles of H2O? 0.25 mol H2O x 6.02 x 1023 molecules H2O mol = 1.505 x 1023 molecules H2O

  5. Mole – Number of Particles Conversion Mole Number of Particles / 6.02 x 1023 particles/mole Sample Problem 2: How many moles are there in 1.2 x 1024 molecules of H2O? 1.2 x 1024 molecules H2O x 1 mole H2O 6.02 x 1023 molecules H2O = 2.0 moles H2O

  6. Molar Mass 1 mole C-12 6.02 x 1023 atoms 12 g 1 mole CO2 6.02 x 1023 molecules 44 g

  7. Molar Mass What is the molar mass of Mg(OH)2? Mg H O 1 mole 2 moles 2 moles 1(24g) = 24 g 2 (1g) = 2g 2 (16g) = 32g 24g+ 2 g +32 g = 58 g The molar mass of Mg(OH)2 is 58g.

  8. Mole –Mass Conversion / Molar Mass Mass Mole x Molar Mass Sample Problem 1: What is the mass of 0.25 moles of H2O? Mass of H2O = 0.25 mol x 18 g mol = 4.5 g

  9. Mole –Mass Conversion / Molar Mass Mass Mole x Molar Mass Sample Problem 2.How many moles are there in 36 g of H2O? Moles of H2O = 36 g x 1 mol 18g = 2.0 mol

More Related