Chemistry final exam

Front

What is a chemical reaction?

Back

A process in which substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.

Front

What is a synthesis reaction?

Back

A type of chemical reaction where two or more simple substances combine to form a more complex product. Example: @@A + B ightarrow AB@@.

Front

What is a decomposition reaction?

Back

A type of chemical reaction where a single compound breaks down into two or more simpler products. Example: @@AB ightarrow A + B@@.

Front

What is a single replacement reaction?

Back

A type of chemical reaction where one element replaces another in a compound. Example: @@A + BC ightarrow AC + B@@.

Front

What is a double replacement reaction?

Back

A type of chemical reaction where two compounds exchange ions or bonds to form two new compounds. Example: @@AB + CD ightarrow AD + CB@@.

Front

What is combustion?

Back

A chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light and heat. Example: @@C_xH_y + O_2 ightarrow CO_2 + H_2O@@.

Front

What does it mean to balance a chemical equation?

Back

To ensure that the number of atoms for each element is the same on both sides of the equation, reflecting the law of conservation of mass.

Front

What is the law of conservation of mass?

Back

A principle stating that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What are reactants in a chemical reaction?

Back

Substances that undergo change during a chemical reaction; they are present on the left side of a chemical equation.

Front

What are products in a chemical reaction?

Back

Substances that are formed as a result of a chemical reaction; they are present on the right side of a chemical equation.