Chemical Reactions 2024

Front

What does the law of conservation of mass mean in chemical reactions?

Back

Matter is not created or destroyed.

Front

What is the only sure evidence for a chemical reaction?

Back

The production of one or more new substances.

Front

What do the numbers in front of a chemical formula in an equation represent?

Back

The number of molecules or atoms of each substance in the reaction.

Front

What does CaCO3 represent in chemistry?

Back

A chemical formula.

Front

Why must equations be balanced in chemical reactions?

Back

To show the conservation of mass.

Front

What is a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.

Front

What is a reactant?

Back

A substance that takes part in and undergoes change during a reaction.

Front

What is a product in a chemical reaction?

Back

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

Front

What is a chemical equation?

Back

A symbolic representation of a chemical reaction.

Front

What does a subscript in a chemical formula indicate?

Back

The number of atoms of an element in a molecule.