Chemical Reactions and Equations

Front

What does a coefficient in a chemical equation represent?

Back

The number of molecules for that compound.

Front

What do scientists use instead of a chemical's long name when writing a chemical equation?

Back

Elemental symbols.

Front

What type of reaction is burning paper?

Back

Chemical reaction.

Front

How can you tell that a chemical reaction has occurred?

Back

Properties of the materials change and energy in the system changes.

Front

What breaks during a chemical reaction?

Back

Bonds.

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products) with different properties.

Front

What are reactants in a chemical equation?

Back

The starting substances that undergo a chemical change.

Front

What are products in a chemical equation?

Back

The substances formed as a result of a chemical reaction.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Front

What is an exothermic reaction?

Back

A reaction that releases energy, usually in the form of heat.