Unit 3 Review - Chemical Processes

Front

A molecule is __________.

Back

more than one atom bonded together.

Front

What does an odor indicate when two substances are mixed and everything looks the same?

Back

A chemical reaction occurred.

Front

When coal is burned, what is true about the products formed?

Back

The products have different chemical properties than those of the reactants.

Front

The new substance(s) that form as the result of a chemical reaction are called __________.

Back

products.

Front

Complete the balanced chemical equation: 4Fe + 3O2 → ___Fe2O3

Back

2.

Front

What is a chemical reaction?

Back

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

Front

What are reactants?

Back

Substances that undergo a chemical change in a reaction.

Front

What is the law of conservation of mass?

Back

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

Front

What is rusting?

Back

A chemical reaction where iron reacts with oxygen and moisture to form iron oxide.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.