A(n) chemical equation has the same number of atoms of each element on each side of the equation.

Each substance on the left side of the arrow in a chemical equation is a _______.

If heat must be added to a chemical reaction for the reaction to take place, the reaction is _______.

What tyep of reaction is shown in the following chemical equation: NH3 + HC1 -> NH4Cl?

Which of the following could represent a decomposition reaction?

A substance that speeds up a chemical reaction without being permanently changed itself is a(n) _________.

The breaking down of a substance into two or more simpler substances is _______.

Each substance to the right of the arrow in a chemical equation is a(n) ____>

Substances that prevent, or slow down, chemical reactions are called _____.

A chemical reaction in which heat energy is released is _____.

According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants?

What type of reaction is shown in the following chemical equation: 2H2) -> 2H2 + O2?

The burning of wood in a campfire that produces heat and light would be both an ______ and an _______ reaction.