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Chem-To-Go Lesson 24 Unit 6 DEFINING AND CALCULATING THE MOLE You’ll want a periodic table and a calculator!
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A metric base unit Defined in 3 ways Represents a specific number Dozen = 12 Pair = 2 Mole = 6.02x10 23 A very LARGE number because atoms are very small WHAT IS A MOLE?
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DEFINING THE MOLE 1.Counting particles in a sample 2.Weighing a sample 3.Measuring the volume of a gaseous sample
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Avogadro’s # Molar Mass Molar Volume Atomic Mass CONVERSION FACTORS!
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Aluminum (Al) is often used for structures such as high-quality bicycle frames. Compute the number of moles in a 10.0-g sample of aluminum. USING MOLAR MASS
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If a scientist uses 0.5 moles of Mg, how many atoms of Mg did she use? USING AVOGADRO’S NUMBER
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During cellular respiration, a cell releases 0.25 mol of O 2 gas. A container of what volume is needed to hold this gas? USING MOLAR VOLUME
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Calculate the number of formula units in a 45.0 gram sample of FeO. APPLYING ALL NECESSARY DEFINITIONS
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See you in class!
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