## Objectives

1. Use the mole concept to determine the number and amount (in moles) of all kinds of particles. Convert between moles of a substance and the number of particles.

N = n * 6.02*10^23

2. Distinguish between and be able to calculate relative molecular mass and molar mass.

3. Solve problems involving the relationship between moles, mass, and molar mass.

n = m/M

4. Solve problems involving the relationship between density, mass and volume.

D = m/V

5. Distinguish between solute, solvent, solution, concentration, and liquid.

6. Solve problems involving concentration, amount of solute, and volume of solution.

N = n * 6.02*10^23

2. Distinguish between and be able to calculate relative molecular mass and molar mass.

3. Solve problems involving the relationship between moles, mass, and molar mass.

n = m/M

4. Solve problems involving the relationship between density, mass and volume.

D = m/V

5. Distinguish between solute, solvent, solution, concentration, and liquid.

6. Solve problems involving concentration, amount of solute, and volume of solution.

## The Mole

The mole is the SI unit for counting particles. One mole of any substance contains 6.02 * 10^23 particles. This number is known as Avogadro's Number, named after Italian scientist Amedeo Avogadro.

"Particles" is a generic term for atoms, formula units, and molecules. Avogadro's number of atoms clearly references an element, Avogadro's number of formula units references an ionic compound, and Avogadro's number of molecules references a covalent compound.

The molar mass of a substance is either the element's atomic mass on the periodic table, or the sum of the atomic masses of a formula unit or a compound.

Below are two PowerPoints that discuss in detail the mole concept. Download the reading guide and answer the questions embed within the ppt.

The Mole, part 1

The Mole, part 2

The Mole Reading Guide

"Particles" is a generic term for atoms, formula units, and molecules. Avogadro's number of atoms clearly references an element, Avogadro's number of formula units references an ionic compound, and Avogadro's number of molecules references a covalent compound.

The molar mass of a substance is either the element's atomic mass on the periodic table, or the sum of the atomic masses of a formula unit or a compound.

Below are two PowerPoints that discuss in detail the mole concept. Download the reading guide and answer the questions embed within the ppt.

The Mole, part 1

The Mole, part 2

The Mole Reading Guide