The Mole and Conversion

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Presentation transcript:

The Mole and Conversion 2.04 The Mole and Conversion

Objectives & Standards After completing this lesson, you will be able to: Describe the mole and its use as a unit of measure in chemistry. Use Avogadro’s number and atomic mass values to complete mathematical conversions. Standards: SC.912.P.8.8—Apply the mole concept and the law of conservation of mass to calculate quantities of chemicals participating in reactions.

Dozen = 12; It is a word used to represent an amount. What is a mole? What is a dozen? Dozen = 12; It is a word used to represent an amount. Other examples, 6 cookies per package. If there are 36 cookies per batch how many batches of cookies must we make to have 48 cookies? 1 batch = 36 cookies 48 Cookies x 1 batch = 1.33 batch 36 cookies

The Mole

Molar Mass Key Terms Definition Conversion Mole Avogadro’s Number

Molar Mass Example: What is the mass of 2.35 mol of sulfur? Given: Conversion Factor(s): Want:

Molar mass Practice How many moles of potassium are in 27.8 grams of potassium (K)? Given: Conversion Factor(s) Want:

Avogadro’s Number Key Terms Definition Conversion Mole Molar Mass

Avogadro’s Number Practice How many moles of aluminum (Al) are equivalent to 3.7 × 1023 atoms? Given: Conversion Factor (s): Want:

Avogadro’s Number Practice How many moles of aluminum (Al) are equivalent to 3.7 × 1023 atoms? Given: Conversion Factor(s): Want:

Mole Flow Chart: 1 or 2 Step Problems What is the mass, in grams, of a sample of 1.20 × 1022 atoms of mercury (Hg)? Given: Want: Conversion Factor(s):

How many moles of bromine (Br) atoms are in a sample of 2 How many moles of bromine (Br) atoms are in a sample of 2.03 × 1024 atoms? Given: Want: Conversion Facors:

How many moles of cesium (Cs) atoms are in 675 g Cs? Given: Want: Conversion Factor(s):

What is the mass of 1.7 × 1023 atoms of zinc (Zn)? Given: Want: Conversion Factor(s):