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- 1. Chapter 8: The Mole<br />Section 8-1: How are atoms counted and measured?<br />
- 2. Review: Chapter 3<br />Bonus Point Opportunity! <br />Atomic Theory:<br />All Matter is composed of atoms<br />What is the SI unit for the amount of substance?<br />The Mole<br />Avagadro’s Number<br />6.022 X 1023 particles/atoms/ions<br />
- 3. Lesson Overview and Objectives<br />By the end of this lesson you will understand how atoms are counted and measured<br />You will be able to define a mole and what it represents<br />You will be able to recite Avagadro’s number and what it represents<br />You will be able to convert from the number of moles in an element to the number of particles/atoms/ions/etc<br />You will be able to convert from the number of particles/atoms/ions/etc in an element to the number of moles<br />
- 4. Review: Conversions<br />Math Review<br />If you have 26 meters how many kilometers do you have?<br />What are we looking for?<br />Kilometers<br />How do we set up the conversion so meters cancel?<br /> 26 m X 1 km<br /> 1 1000 m<br /> 26 m X 1 km =<br /> 1 1000 m<br /> 26 km = .026 km<br /> 1000<br />
- 5. What is a Mole?<br />Elements are made up of atoms - the number of atoms in a small sample of an element is astronomical <br />Scientists needed to find a way to deal with them on a larger scale- so they created a new unit of quantity<br />The mole is:<br />The number of atoms in exactly 12g of carbon-12<br />
- 6. What Does a Mole Represent?<br />“Is a counting unit used for measuring an amount of a substance”<br />Refer to table 8-1 on page 275 in text<br />Easter Eggs, pennies, spoons<br />
- 7. What is Avagadro’s Number?<br />Avagadro’s number is the number of particles in a mole<br />6.022 X 1023 particles in a mole<br />Avagadro’s number is a constant, meaning that it does not change<br />
- 8. What Does Avagadro's Number Represent?<br />While Avagadro’s number represents the number of particles in a mole, particles has multiple meanings<br />Particles can mean:<br />Atoms, Ions, molecules, electrons, bonds, etc<br />How many atoms are in a mole?<br />6.022 X 1023<br />How many Ions are in a mole?<br />6.022 X 1023<br />How many molecules are in a mole?<br />6.022 X 1023<br />
- 9. Concept Check: Avagadro’s Number<br />What is Avagadro’s Number?<br />Avagadro’s number is the number of particles in a mole<br />6.022 X 1023<br />What can a particle represent?<br />Atoms<br />Ions<br />Molecules<br /><ul><li>How many moles are in 6.022 X 1023 atoms of H?</li></ul>1 mole<br />How many Ions are in one mole of Na?<br />6.022 X 1023<br />How many atoms are in 2 moles of He?<br />1.2044 X 1024<br />
- 10. Conversion Time: Moles to Atoms<br />Convert 4.2 Moles of He to atoms<br />Convert 3.6 Moles of N to atoms<br />Convert 1.3 Moles of C to ions<br />Convert 2.6 moles of Na to molecules<br />
- 11. Conversion Time: Atoms to Moles<br />Convert 6.4 X 1023 atoms of S to Moles<br />Convert 8.6 X 1024 atoms of F to Moles<br />Convert 1.3 X 1023 atoms of Si to Moles<br />Convert 4.2 X 1023 ions of Ni to Moles<br />Convert 2.3 X 1023 molecules of C to Moles<br />
- 12. Wrap-Up<br />When converting atoms/ions/molecules/etc to moles what constant do you use?<br />6.022 X 1023 <br />What is that constant called?<br />Avagadro’s Number<br />How many ions are in one mole?<br />6.022 X 1023<br />Questions?<br />

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