Unit 6 Chemical Reactions Test Review

Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where one compound breaks down into two or more simpler products. Example: AB → A + B.

Front

What is a chemical reaction?

Back

A chemical reaction is a process by which the atoms of one or more substances are rearranged to form different substances.

Front

What does the Law of Conservation of Mass state?

Back

The Law of Conservation of Mass states that the total mass of the reactants is always equal to the total mass of the products in a chemical reaction.

Front

What are subscripts in a chemical equation?

Back

Subscripts are the small numbers in a chemical formula that indicate the number of atoms of each element in a molecule. They cannot be changed in a balanced equation.

Front

How many Aluminum atoms are in 4Al₂O₃?

Back

There are 8 Aluminum atoms in 4Al₂O₃.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

What is the difference between coefficients and subscripts?

Back

Coefficients are numbers placed before compounds in a chemical equation to indicate how many molecules are involved, while subscripts indicate the number of atoms in a molecule.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, following the Law of Conservation of Mass.

Front

What is an example of a synthesis reaction?

Back

A synthesis reaction is when two or more simple substances combine to form a more complex substance. Example: A + B → AB.