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Chem Catalyst

Chem Catalyst. How many eggs are in 2.5 dozen? If apples are 3/$1, how much will 9 apples cost? If a box of pasta is 16 oz., how much will 3 boxes of pasta weigh?. Today’s Agenda:. Catalyst Introduce Unit 6: Stoichiometry Introduce Chapter 10: Chemical Quantities Notes- The mole!

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Chem Catalyst

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  1. Chem Catalyst • How many eggs are in 2.5 dozen? • If apples are 3/$1, how much will 9 apples cost? • If a box of pasta is 16 oz., how much will 3 boxes of pasta weigh?

  2. Today’s Agenda: • Catalyst • Introduce Unit 6: Stoichiometry • Introduce Chapter 10: Chemical Quantities • Notes- The mole! • HW: p. 296 #10, 13, 14

  3. Unit 6: Stoichiometry Chapter 10: Chemical Quantities Chapter 12: Stoichiometry

  4. Unit 6: StoichiometryBIG Questions • Why do chemists use moles? • How does a chemical equation represent chemical quantities? • How can chemical quantities be manipulated?

  5. Chapter 10: Chemical Quantities 10.1: The Mole: A Measurement of Matter - Avogadro’s number 10.2: Mole-Mass and Mole-Volume Relationships - Convert between moles and mass 10.3: Percent Composition and Chemical Formulas - Understanding the relationship between chemical formulas and quantities

  6. The Mole • Set measurement of particles: SI Unit for measuring amount of substance • 1 mol = 6.02 x 1023 particles • *** Known as Avogadro’s number - Particles can be atoms or molecules

  7. Conversion: Particles to Moles • Multiply by (1 mol/ 6.02 x 1023 particles) • Ex: How many moles is 2.80 x 1024 atoms of silicon?

  8. Conversion: Moles to Particles • Multiply by (6.02 x 1023 particles/ 1 mol) • Ex: How many molecules are in 1.14 mol of SO3?

  9. Practice: • How many moles is 2.17 x 1023 particles of Br2? • How many moles is 1.25 x 1023 atoms of Mg? • How many molecules are in 2.12 mol of propane? • How many molecules are in 3.5 mol of sodium hydroxide?

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