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

Atomic Mass Unit Counting by weighing Relative mass to C-12 amu is 1/12th C-12 1 amu = 1.66 x 10-24 g Amu is for mass of individual atoms

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

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

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

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

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

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