1. The Mole and Mole Concepts
Test Chapter 6 Review
The Mole and Mole Concepts

2. Atomic Mass Unit Counting by weighing Relative mass to C-12
amu is 1/12th C-12
1 amu = 1.66 x g
Amu is for mass of individual atoms

3. The Mole Representative Unit Atoms in a mole equals Avogadro's Number
NA=6.022e23
Mole of atoms has a mass equal to the atomic mass on the periodic table
Molar mass is the mass for one mole of those atoms

4. Mole Conversions
The mole allows conversion between individual particles and mass.
Use the mole hub to convert between molecules or atoms, moles, and mass.
Mass ↔ moles ↔ particles
Mass to moles use molar mass
Moles to particles use NA

5. Percent Composition
% Composition is the percentage by mass of an individual element in a compound

6. Empirical Mass Lowest Ratio of elements in a compound
Actual formula for ionic compounds
Two techniques for solution
Given mass
Given percent

7. Molecular Formula The actual number of elements present in the formula
Equal to the empirical formula for ionic compounds
Found by using the empirical and molecular mass

8. Test Format Matching Terms Multiple Choice
Show Work calculation Questions
Mass
Moles
Particles
% Composition
Empirical Formula
Molecular Formula