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Chemistry 1 Notes #5 Chapter 11 Section 1 THE MOLE & particle calculations

Chemistry 1 Notes #5 Chapter 11 Section 1 THE MOLE & particle calculations. Last updated June 10, 2014. MOLEs. Moles Moles Moles Moles Moles Moles Moles. Measuring Matter. What is a mole? The Mole is an SI base unit for the amount of a substance.

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Chemistry 1 Notes #5 Chapter 11 Section 1 THE MOLE & particle calculations

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  1. Chemistry 1Notes #5Chapter 11 Section 1THE MOLE& particle calculations Last updated June 10, 2014

  2. MOLEs • Moles • Moles • Moles • Moles • Moles • Moles • Moles

  3. Measuring Matter • What is a mole? • The Mole is an SI base unit for the amount of a substance. • Saying there is a mole of something is just like saying there is a dozen of something. The mole represents the number of atoms, particles, or molecules just like a dozen represents twelve of something.

  4. Whereas a dozen is known as 12 of something, a pair is always 2, and a gross is always 144. This number never changes but what is counted does. • The same can be said about the mole

  5. The mole represents 6.02x1023 of something. • This number is called Avogadro’s number • In chemistry the mole is used to measure how many atoms, particles or molecules something contains

  6. Converting Moles to Particles and Vice versa • Using the mole and knowing how many particles, atoms or molecules, converting from the mole to how many particles and back is simple • Problem: How many atoms are in 1.76 mol of Zn

  7. Solution:

  8. Problem 2 • How many mol are in 2.33x1027 particles of Carbon? Actual answer 3870 mol C or 3.87 x 103 mol C

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