An explanation the mole (named for molecule) and Avogadro's Number. One mole of a substance is equal to 6.022 times 10 to 23rd power units of that substance (such as atoms, molecules, or ions). The number 6.022 time 10 to 23rd power is...

This site deals with Amedeo Avogadro, his life, his contributions to chemistry, and his famous number.

This slide and audio book shows how to relate mass to a number of particles by using many formulas, examples, and real life scenarios. View the weighted average calculations, Avogadro's number, the atomic mass of carbon, and molar mass.

Video describes how moles are used in chemistry and how their size is measured. [4:33] Followed by a short quiz and a list of additional resources to explore.

A section in a college textbook exploring the ideal gas law in relation to molecules and in terms of moles. Learn how to calculate the variables in the ideal gas law. Also become familiar with Avogadro's number and how to use it to...

As part of the "Basic Atomics" section of the Virtual Textbook, this site examines moles. The information presented defines moles in relation to Avogadro's number and then goes on to describe molar mass and molar volume.

This page from Iowa State University describes the various experimental ways that Avogadro's number has been determined.

A page, written by Donald E. Simanek of Lock Haven University discusses misused and misunderstood physics terms and concepts. It reminds us that Avogadro's number is a constant, and should be treated as such.

Learn how to define a mole as a number, and estimate the size of a mole of some common objects. [3:18]

[Free Registration/Login may be required to access all resource tools.] In the following online tutorial students will identify three methods for measuring the amount of matter in a sample. They will define the mole and its relationship...

By the end of this section, you will be able to state the ideal gas law in terms of molecules and in terms of moles; use the ideal gas law to calculate pressure change, temperature change, volume change, or the number of molecules or...

An introduction to the mole, a unit of measurement that quantifies atoms and molecules.

Animation depicting Avogadro's Law or how the volume of a gas is affected by the number of gas particles. See what happens to the volume of a gas when the pressure and temperature stay constant.

[Free Registration/Login Required] In the mole carnival, students count the number of atoms and particles in different objects found at the carnival. As students work to find the number of particles, they practice counting particles by...

[Free Registration/Login may be required to access all resource tools.] In this learning module, students investigate the mole concept, and learn three ways scientists to quantify things as tiny as atoms.

[Free Registration/Login may be required to access all resource tools.] The following online tutorial describes how a gas can be compressed and identifies three factors that affect gas pressure. Students will describe the effects...

Watch a short tutorial showing the conversion between the amount of a substance expressed in number of molecules to the amount of a substance expressed in moles of molecules, and then try some dimensional analysis practice problems.

A collection of video lectures to teach junior high students topics in chemistry. Lectures cover topics in understanding the periodic table, compounds, chemical bonding, Avogadro's number, balancing chemical equations, stoichiometry,...

This site defines and discusses the ideal gas law. The concept of state variables is explained and the various state variables are identified. Links to further information is available.

[Free Registration/Login may be required to access all resource tools.] Students read about and explore video clips, diagrams, and example problems using the Ideal Gas Law.

Explore the thermal behavior of gases, in particular, examine the characteristics of atoms and molecules that compose gases. Learn about the ideal law of gases in terms of molecules and moles. Multiple formulas and examples are provided.

This lesson will define a mole as a number and a unit (similar to a dozen). It is 2 of 2 in the series titled "Mole as a Quantity."

The ideal gas law is stated and explained at this site from the Towson University. It is then used to derive the other gas laws (Charles, Boyle's, Gay-Lussac's, Avogadro's, combined, etc.). Other gas law relationships are discussed....

The world's roundest object helps solve the longest running problem in measurement- how to define the kilogram. A kilogram isn't what it used to be. Literally. The name, weight, and definition of a kilogram has been changing constantly...