Chemical Reactions #2

Front

What do 4 grams of hydrogen and 32 grams of oxygen combine to form?

Back

36 grams of water.

Front

Which of the following is an example of a chemical change?

Back

All of the above (Burning wood, Rust on a car, Cooking food).

Front

What observations might indicate that a chemical reaction has occurred?

Back

Color change, Odor change, Properties change - All of the above.

Front

What is made of more than one atom?

Back

A molecule.

Front

In a chemical reaction, what are the substances that are formed called?

Back

Products.

Front

What are the starting substances in a chemical reaction called?

Back

Reactants.

Front

What is a chemical reaction?

Back

A process where reactants transform into products, involving the breaking and forming of bonds.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a catalyst?

Back

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