2.04 The Mole and Conversion. Objectives & Standards Objectives: After completing this lesson, you will be able to: Describe the mole and its use as a.

2.04

The Mole and Conversion

Objectives & Standards

• Objectives: • 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.

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 cookies48 Cookies x 1 batch = 1.33 batch

36 cookies

The Mole

Molar Mass Key Terms Definition Conversion

Mole

Avogadro’s Number

Molar Mass

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 NumberKey Terms Definition Conversion

Mole

Avogadro’s Number

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 ProblemsWhat 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 2.03 × 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):