Chemical Formulas, Equations & Reactions

Front

What is evidence of a chemical reaction?

Back

Gas is released.

Front

What is an example of a physical change?

Back

Putting an object in a box.

Front

How do you know a chemical reaction has occurred when baking?

Back

The ingredients cannot be returned to their original state.

Front

What is a chemical substance present at the start of a chemical reaction called?

Back

Reactant.

Front

What states that the total mass before a chemical reaction is the same as the mass after the reaction?

Back

Law of conservation of mass.

Front

What is a chemical equation?

Back

A representation of a chemical reaction using symbols and formulas.

Front

What are products in a chemical reaction?

Back

Substances formed as a result of a chemical reaction.

Front

What is a balanced chemical equation?

Back

An equation where the number of atoms for each element is the same on both sides.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the substance's chemical composition, while a chemical change does.

Front

What is a catalyst?

Back

A substance that speeds up a chemical reaction without being consumed.