Balancing Equations Review

Front

Endo means in or _______.

Back

absorbed

Front

How many molecules are represented in the formula 3CO₂?

Back

3 carbon dioxide

Front

How many atoms of aluminum are on each side of the following equation: 4Al + 3O₂ --> 2Al₂O₃?

Back

4

Front

Chemical equations are balanced with numbers called _______.

Back

coefficients

Front

Which equation best represents the law of conservation of mass?

Back

C

Front

What is a chemical equation?

Back

A representation of a chemical reaction using symbols and formulas.

Front

What does the law of conservation of mass state?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What are coefficients in a chemical equation?

Back

Numbers placed in front of compounds to balance the equation.

Front

What is the purpose of balancing chemical equations?

Back

To ensure that the same number of each type of atom appears on both sides of the equation.

Front

What are reactants in a chemical reaction?

Back

Substances that undergo change during the reaction.