Unit 3: Chemical Reactions and Equations Final Assessment Review

Front

Is this equation balanced?

Back

Yes

Front

What kind of matter is salt (NaCl)?

Back

Compound

Front

Carbon dioxide can be poured out of a bottle. It sinks in the air. This shows it is:

Back

More dense than air

Front

What does the Law of Conservation of Mass state?

Back

No new atoms can be made or destroyed

Front

What coefficient should go in the last blank space in order for the equation to be balanced?

Back

2

Front

What is a chemical reaction?

Back

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

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed when two or more elements chemically bond, while a mixture is a combination of two or more substances that retain their individual properties.

Front

What is the role of a coefficient in a chemical equation?

Back

A coefficient indicates the number of molecules or moles of a substance involved in a reaction.

Front

What is an example of a physical change?

Back

Melting ice is a physical change because it changes state but not chemical composition.

Front

What is an example of a chemical change?

Back

Burning wood is a chemical change because it transforms the wood into new substances.