PhET
Build a Molecule
How many different molecules can you build? In a simulation, learners make molecules from given atoms. There are numerous collections from which to build three to five molecules from given kits of atoms. Scholars can also view their...
Curated OER
2007 U.S. National Chemistry Olympiad Local Section Exam
Sixty multiple choice questions cover the entire gamut of chemistry concepts. This is the local section of the U.S. National Chemistry Olympiad, where your chemistry candidates take a shot at entering the national competition. They...
National Institute of Open Schooling
Chemical Arithmetics
Substances with the same empirical and molecular formula must be differentiated by their structural formula. Part two in a series of 36 has pupils using chemical formulas to calculate how much of a compound is present in a given...
Science Geek
Percent Composition, Empirical and Molecular Formulas
Help your pupils understand when empirical becomes molecular. The lesson presentation demonstrates the connection between empirical formulas and molecular formulas. Then, given percent composition, the lesson demonstrates the steps to...
Curated OER
Chapter 6 - Bonds
Although there are only 16 questions here, this chemistry handout makes a terrific unit assessment. It queries youngsters on the properties of ionic and covalent compounds, relates bond length tho stability and enrgy, compares polar and...
Curated OER
Empirical Formula
Plenty of time was invested in creating this detailed presentation. The first slide alone includes several steps that support your explanation of percent composition, a precursor to understanding how to write empirical and molecular...
Curated OER
Oxidation Numbers and Ionic Compounds
For this oxidation numbers and ionic compounds worksheet, students write the formula for compounds given ions, they write the ions given formulas, they list oxidation numbers for elements, they write formulas for compounds and they name...
Curated OER
Practice Final
A full-fledged practice final prepares pupils for their general chemistry final exam. If they complete these 57 multiple-choice questions correctly, they will be well-prepared. Note: even though the questions are multiple-choice, there...
Curated OER
Chemistry Practice
In this chemistry overview worksheet, students calculated the volume of different gases and liquids given in a word problem. Students had to calculate the molecular mass and write the empirical formula and the molecular formula.
Curated OER
Empirical Formula: From Percentage to Formula
Starting with definitions of empirical and molecular formulas, this slide show guides pupils through the ways to calculate and produce chemical formulas as percentages and molar ratios. A number of examples are given for viewers to try...
Curated OER
Empirical and Molecular Formulas
In this compounds worksheet, students write the empirical formulas or the molecular formula for the given chemical compounds. This worksheet has 20 problems to solve.
Curated OER
Percentage Composition and Empirical & Molecular Formula
In this compounds learning exercise, students determine the empirical and molecular formulas for given compounds. This learning exercise has 10 problems to solve.
Curated OER
Percentage Composition
In this chemical compounds worksheet, students determine the empirical formula or the molecular formula for the compounds given. Students calculate percent composition. This worksheet has 10 problems to solve.
Curated OER
Organic Chemistry Practice Test
Framed as an organic chemistry practice test, this resource could be used for a variety of purposes. Composed of 15 questions about organic compounds such as isomers, alkynes, alkenes and amines, and other topics related to organic...
Curated OER
Alkene Reactions
In this chemistry worksheet, students write structural formulas for the products and illustrate stereo chemistry when necessary. Then they write the structures for the molecular formulas given for reactants and products for each problem.
Curated OER
Organic Chemistry
In this organic chemistry worksheet, students fill in two charts with prefixes used for alkanes and the names and chemical formulas for different alkanes. They draw structural and chemical formulas for given organic compounds.
Curated OER
What do Chemists See When they Look at Chemicals?
In this naming chemicals instructional activity, students indicate the prefixes for naming compounds. They fill in a chart with the chemical names and formulas for alkanes. They draw the structural and molecular formula for propane and...
Curated OER
Empirical Formulas
High schoolers investigate empirical formulas for molecules. For this empirical formulas lesson plan, students use paper ions to form formulas and they show these are empirical formulas. They use ions of carbon and hydrogen showing...
Curated OER
Models of Hydrocarbons
Students construct models of hydrocarbon molecules using candy and toothpicks. In this hydrocarbons lesson plan, students are given a sheet with the molecular formulas of hydrocarbons. As a group, they construct each molecule using...
Curated OER
Exam Review: Chemistry Calculations
For this chemistry calculations review worksheet, students solve 33 review problems about titrations, precipitates, pressure and volume of gases, combustion reactions, heat of combustion, molar concentrations and molecular formulas.
Curated OER
Unit 2 Quantities Review
In this quantities in chemistry worksheet, students solve 13 review problems about percent composition, significant digits, the mole, simple and molecular formulas, balancing equations, stoichiometry, limiting reagents and percent yields.
Curated OER
Naming Molecular Compounds
In this naming molecular compounds activity, students are given 8 formulas of molecular compounds and they write the names for each. Students are then given 8 names of molecular compounds and they write the formula for each.
Curated OER
WS 10.1 Organic Chemistry
In this organic chemistry worksheet, students compare inorganic and organic compounds. They write structural and molecular formulas for given molecules.
Curated OER
Worksheet 2-2 Stoichiometric Tools
In this stoichiometry worksheet, students solve a variety of problems including finding empirical and molecular formulas, determining molarities of solutions, determining molecular weights of compounds and calculating the percent mass of...