Counting Atoms

Front

What is a chemical reaction?

Back

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

Front

What evidence indicates a chemical reaction has occurred?

Back

The production of a new substance.

Front

How many atoms of oxygen are in 3Fe₂O₃?

Back

9

Front

How many atoms of hydrogen are in C₆H₁₂O₆?

Back

12

Front

What is a precipitate?

Back

A solid that has formed from a solution during a chemical reaction.

Front

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

Back

A chemical change results in the formation of new substances, while a physical change does not.

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 a reactant?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product?

Back

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

Front

What happens to the atoms in a chemical reaction?

Back

Atoms are rearranged to form new substances.