Students examine standard pressure in this interactive object.

In this animated and interactive object, learners examine the properties of liquids, solids, and gases.

Learners combine Boyle's Law and Charles's Law to solve for the pressure, volume, and temperature of a gas sample under two sets of conditions.

In this interactive object, learners use the ideal gas law to solve a practice problem.

Learners examine the method used to calculate the mass percent of an element in a compound. Three examples and one problem illustrate the method.

Learners examine the meaning of oxidation, reduction, and half-reaction, and watch a film showing the deposition of copper metal from the reduction of copper (II) ion by aluminum. A brief quiz completes the activity.

In this animated and interactive object, learners follow two rules to write unit conversion fractions.

Learners view several movie clips that demonstrate the use of an indicator to follow the neutralization reaction that occurs when an acid and a base are mixed. Students test their knowledge in a series of questions. Immediate feedback is given.

Students examine atomic structure and the octet rule.

In this animated activity, learners compare the van der Waals equation with the Ideal Gas Law.

In this colorful, interactive object, learners examine how materials on the nanoscale compare with those on the macroscale. The focus is on the difference between macroscale and nanoscale gold in both color and melting point.

Learners view illustrations showing the direct dependence of the volume of a gas on temperature and consider the relationship between the Kelvin and Celsius temperature scales.

Students read different definitions of "acids" and "bases." In an interactive exercise, they identify if a substance is an acid or a base.

In this animated object, students examine what happens when electrons share molecules.

Learners convert units used to designate pressure. Units for pressure are atm, mm Hg, torr, and pascal.

In this animated object, students are introduced to moles as a measurement.

In this interactive object, learners calculate the amount of heat evolved or absorbed in chemical reactions. Four practice problems are provided.

Learners examine the method for calculating the atomic weight of copper from the natural percent composition of each of its two isotopes.

In this animated and interactive object, learners examine the inverse proportionality of wavelength and frequency and their relationship to the speed of light.

In this interactive object, learners determine the limiting reagent and the excess reagent in chemical reactions. Learners test their knowledge by solving three problems.