Ch 2.4 FOLDER Flashcard

Front

Atoms are NEVER ___

Back

destroyed

Front

Compounds can be separated by filtration and/or distillation. True or False?

Back

False

Front

In the equation CH4 + 2 O2 → CO2 + 2 H2O, CO2 is a ___

Back

product

Front

Formation of a precipitate is an example of a chemical change. True or False?

Back

True

Front

Which of the following is a sign that a chemical reaction has occurred? Change in color, Melting, Change in shape, Dissolving

Back

Change in color

Front

What is a chemical change?

Back

A process where substances combine or break apart to form new substances.

Front

What is a reactant?

Back

A substance that is present at the start of a chemical reaction.

Front

What is a product?

Back

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

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a precipitate?

Back

A solid that forms and settles out of a liquid mixture.