Students use algebra to rearrange formulas and solve for the missing volume, density, or mass quantity.

Learners read about lab equipment and basic safety measures. In a quiz, they view photos and determine if the lab technicians pictured are using safe practices.

In this screencast, students read about the basic organization and structure of the periodic table of elements. Students identify elements as belonging to a group, a period, or neither.

In this screencast we are introduced to the lab equipment used to contain and dispense chemicals.

Students practice identifying common elements from the periodic table by name or symbol.

In this interactive lesson, students examine the quantitative relationship between chemicals in a balanced mathematical equation.

Students read brief descriptions of atoms, molecules, elements, and compounds, and complete a matching exercise that pictures these particles and molecules as pieces of taffy.

In this animated object, learners examine the chemistry behind table salt.

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

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

Students examine atomic structure and the octet rule.

Learners examine phase diagrams that show the phases of solid, liquid, and gas as well as the triple point and critical point.

Students examine standard pressure in this interactive object.

Learners use the coefficients in a balanced equation to develop the mole ratios of reactants and products involved in the reaction. Five interactive examples illustrate the method, and students test their knowledge by working four problems.

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

Students solve a molarity problem in a drag and drop exercise.

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

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.

In this animated object, learners examine the formation of ester bonds in the synthesis of lipids using triglyceride biosynthesis as an example. Ester bond formation is described as a dehydration synthesis reaction.

Learners examine the periodic table to identify metallic elements that have either fixed or variable oxidation states.