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Chemistry is the branch of science that studies matter and interactions between substances. Chemistry is used in all walks of life from the moment you wake up and brush your teeth to the moment you answer your mobile phone. Chemistry is a math intensive science. You will learn things like the most common element in the universe is hydrogen. You will also learn that the most used controlled reaction is fire. It is used to make more things and mostly like the pinnacle tool used by humans.

This is one of our bigger science sections. The sheets found here start with organic chemistry and advance to understanding the interactions between substances including energy release and bonding.

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Inorganic Vs. Organic Compounds

Classify each form of matter and describe its properties.

The Dehydration Sythesis Reaction

Dehydration synthesis is a type of chemical reaction that combines reactants in a way that results in a larger molecule and one or more water molecules.

The Hydrolysis Reaction

The reaction that is the opposite of a dehydration synthesis is termed hydrolysis. During a hydrolysis reaction, the addition of one or more water molecules results in the breaking down of a large molecule into smaller ones.

Chemical Symbols Crossword

Use the symbols to find the names of the elements needed to complete the puzzle.

Formulas of Molecules

We use chemical formulas to represent the number and identities of atoms in molecules. For each of the molecules drawn below, provide the chemical formula.

Compound and Elements

We use chemical formulas to represent the number and identities of atoms in molecules. For each of the chemical formula listed below, provide the name of the compound and the names of the individual elements present.

Chemicals Crossword

Find what substance they are describing in each case.

Heat Energy

Joules and calories are the units used to measure heat energy. When heat is emitted or absorbed, the amount of heat transferred is calculated via the following formula.

Phase Changes and Heat Exchange

During a phase change heat energy is absorbed or emitted to change the phase of the material, but the temperature remains the same

Mixture or Substance?

In the table below, classify the following materials as substances or mixtures by writing S or M respectively in the empty boxes.

Homogeneous or Heterogeneous

Classify each substance we see here.

Colloids, Solutions, and Suspensions

Label the following liquid mixtures as a solution, colloid or suspension and provide an example of each type of mixture.

Chemical and Physical Properties

Is what we show you a physical or chemical property?

Chemical and Physical Changes

In the table below, classify the following examples of change as chemical or physical.

Separating Mixtures

Often we wish to separate mixtures into their individual components (e.g., if one is more valuable or useful on its own) We can do this by using the differences in the physical and chemical properties of the components.

Symbols of Elements

Provide the name for the element corresponding to the chemical symbols.

Elements Crossword

Name all of those bad boys out there.

Properties of Metals and Nonmetals

We give you a property and you tell us if it's for metals or nonmetals.

Element Activity

Keeping these properties in mind and by using a periodic table, indicate the most chemically active element in each pair.

Types of Chemical Bonds

Describe the bond between the elements as covalent (nonmetal and metal), ionic (nonmetal and metal), or both (for compounds containing a polyatomic ion).

The Conservation of Mass

Mass is not gained nor lost during chemical reactions; atoms are merely rearranged into different compounds. The total mass of the reactants in a chemical process is therefore equal to the total mass of the products.

Mass relationships in Equations

We can use a balanced chemical equation and the molecular weights to determine the mass relationships involved in a chemical reaction.

The Colligative Properties of Substances

When a solution has a substance dissolved in it, its freezing point and boiling point are altered by the presence of these particles.

Calculating Mass and Volume

Use the mass/volume concentration concept, provide the answers to the questions.

Calculating Percentage By Volume Concentrations

Several different concentrations of solutes in solvents are used in practice. One of these is the % by volume concentration which is calculated via the equation shown in the box.

Calculating Percentage By Mass Concentrations

Several different concentrations of solutes in solvents are used in practice. One of these is the % by mass concentration which is calculated via the equation shown in the box.

Solubility of Compounds

Follow the general rules for solubility and provide labels indicating whether the following compounds are soluble or insoluble.

Radioactive Decay Rates

A half-life is the time required for one-half of a radioactive material to decay and change to another element.

Diagraming Nuclear Reactors

Provide labels on the diagram of a nuclear reactor using the list of parts in the box below. In the list, describe the function or purpose of each part.

Alternative Fuel Crossword

Some interesting answers can be found here.