CHEMISTRY TOPIC SUMMARY
Name: ________________________
Block: ________
Date: _______________
Topic F: Chemical Composition and the Mole
Purple Packet
Textbook Reference
Pages 53-68
Chapter 6
Purpose
Moles give us a consistent method to convert between atoms/molecules and grams. It is a convenient
unit to use when performing many calculations in chemistry. The mole is widely used in chemistry,
instead of units of mass or volume, as a convenient way to express the amounts of reactants and
products of chemical reactions. The concepts of a mole and percent composition are important as we
move into the next topics including chemical reactions, balancing reactions, and stoichiometry.
Schedule
A and B
11/19 and
11/20
11/26 and
11/27
11/28 and
11/29
11/30 and
12/3
12/4 and
12/5
Due
 Dimensional
Analysis
Review
 Worksheet 1
(pages 61-62
excluding #s
17, 18, 19)
 Worksheet 2
(pages 63-64)
 Worksheet 3
(page 65)
 Review
Worksheet
(pages 67-68)
In-Class
 Dimensional Analysis Review
 Part 1 of Notes on Chemical
Composition and the Mole
 Part 1 of Notes Review
 Notes: Chemical Composition and
the Mole Part II
 In-Class Practice
 The Bean/Mole Lab
 In-Class Practice
 Laboratory Investigation
* LAB APPROPRIATE ATTIRE
REQUIRED!!!!
 Review
 TEST
HW Assignments
 Worksheet 1 (pages
61-62 excluding #s
17, 18, and 19)
 Worksheet 2 (63-64)



Worksheet 3 (page
65)
Review Worksheet
(pages 67-68)
N/A
Vocabulary
Atomic mass unit (amu)
Mole
Avagadro’s Number
Molar Mass
Molecular Weight
Percent composition
Empirical formula
Molecular formula
CHEMISTRY TOPIC SUMMARY
Name: ________________________
Block: ________
Date: _______________
By the end of this Topic, you should be able to demonstrate proficiency in the following areas:
Essential Understandings
The concepts developed in this standard include the following:

Atoms and molecules are too small to count by usual means. A mole is a way of
counting any type of particle (atoms, molecules, and formula units).

Avogadro’s number = 6.02 × 1023 particles per mole.

Molar mass of a substance is its average atomic mass in grams from the Periodic Table.

The empirical formula shows the simplest whole-number ratio in which the atoms of
the elements are present in the compound.

The molecular formula shows the actual number of atoms of each element in one
molecule of the substance.
Knowledge, and Skills
In order to meet this standard, it is expected that students will

perform conversions between mass, volume (not yet!), particles, and moles of a
substance.