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Chapter 11

Chapter 11. The Mole. Read pgs. 308-319. Write down what you think are the 3 most important concepts, points from the section. Measuring Matter. What are some terms we use to measure amounts of things? Review conversion factors SHOW WORK 12 pairs of shoes = _______shoes

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Chapter 11

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  1. Chapter 11 The Mole

  2. Read pgs. 308-319 • Write down what you think are the 3 most important concepts, points from the section

  3. Measuring Matter • What are some terms we use to measure amounts of things? • Review conversion factors SHOW WORK • 12 pairs of shoes = _______shoes • 8 reams of paper = _______ pieces (1 ream = 500 sheets) • 4 dozen roses = _________ roses

  4. What is a mole? • SI base unit used to measure amount of a substance • Mole = 6.022 x 1023 particles • This # is called Avogadro’s number • Carbon-12 is the standard. A mole is the number of particles in exactly 12g of pure carbon-12 • molecule = # atoms= formula unit

  5. Converting Moles to Particles and particles to moles • 3.50 moles sucrose = _____ molecules • 3.50moles of zinc = ______ atoms • 11.5 moles of H20 = ____ molecules • How many moles are there in 4.50 x 10 24 atoms of zinc, Zn? Solve practice problems on pg.311#’s 1-2 and 312(all)

  6. Mass <=>Mole • Molar mass – grams/mol allows us to convert between mass and moles • Mass of one mole of an element corresponds to atomic mass on P.T. • Calculate the mass in grams of .0450moles of chromium • 165g Mn = _____moles Pg. 316 solve practice problems for #’s 11 &12

  7. Mass <=> Atoms • g xmolx atom g mol • How many atoms are in 2.5g of gold? • What is the mass of 4.93 x 1025 atoms of gold?

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