Students identify principles behind acid-base reactions. They predict factors that may affect an acid-base reaction. Students identify questions and concepts that guide scientific investigations.

In this chemical reactions instructional activity, students are given directions about three types of reactions and how to write balanced equations for each. They then are given ten practice problems to complete using the information given.

Young scholars conduct a series of experiments to explore Graham's law. In this chemistry instructional activity, students differentiate effusion and diffusion. They perform calculations using Boyle's, Henry's, Charles' and Graham's Laws.

In this solutions and solubility review worksheet, students are given main ideas about intermolecular forces, concentrations of solutions, molar solutions, ionic equations, solubility rules, acids and bases and titrations. Students...

Hopefully by the time high schoolers are enrolled in your chemistry class, they are skilled with unit conversion. It does not hurt, however, to take an hour early in the school year to review this vital skill. This plan simply provides a...

Students view a video that presents the biogeochemical cycle of nitrogen. They compare types of soils and consider how different fertilizers affect soil composition.

Students examine the characteristics of lactose and lactase.  In this enzyme lesson students study the lactose in milk and its rate of dissolution.

Students convert mole to mass to particles and vice versa. In this chemistry lesson, students discuss the importance of Avogadro's number. They apply what they have learned in a team competition.

Discussion of molecular formula and how to determine it from empirical formula. Practice problems are available.

This is a seven part site from the University of Nebraska on molecular formulas. Sections are: Introduction, Purpose, General Safety Considerations, Procedure, Data Analysis and Concept Development, Implications and Applications,...

[Free Registration/Login may be required to access all resource tools.] In this online tutorial students will learn to calculate the percent composition of a compound either from mass data or from the chemical formula. They will use...

[Free Registration/Login may be required to access all resource tools.] Defines molecular formula and describes how to write molecular formulas.

Listen as this audio book shows the determination of empirical and molecular formulas. View the formula to calculate empirical and molecular formulas and the written steps for calculating.

[Free Registration/Login may be required to access all resource tools.] Students will use a chemical formula or mass data to calculate the percent composition of a compound, and then calculate the empirical or molecular formula for a...

Explanation of how to calculate empirical and molecular formulas.

Determining empirical formula from analytical data, and determing molecular formula from empirical formula, with flow charts and sample calculations.

This tutorial reviews how to calculate molecular formula by giving students video, exercises, and practice.

[Free Registration/Login Required] In this interactive you will move the end of each arrow to connect the label with the correct model of each molecule. You will need a sign-in to access this media, but it will be well worth your time!

A brief explanation of the relationship between molecular formula and empirical formula.

Slides in presentation show how to use mass percent to calculate empirical and molecular formulas.

The steps for determining an empirical formula are listed on this site. Also, it tells how to determine the molecular formula from an empirical formula. Two example problems are worked through step by step.

[Free Registration/Login may be required to access all resource tools.] How to write chemical formulae and what they represent about the substance.

We gain a better understanding of pressure and temperature from the kinetic theory of gases, which assumes that atoms and molecules are in continuous random motion. Learn more about Kinetic Theory with the following detailed resource...

Provides a good outline of the concepts involved in ionic and covalent bonding, with links to definition of terms. Features a list of common molecular compounds and a chart that compares ionic and molecular compounds.