Chemistry Review

Front

What is the chemical formula for sodium sulfate?

Back

Na2SO4

Front

How many hydrogen atoms are in the reactant side of the equation 2H2 + O2 -> 2H2O?

Back

4

Front

What is the total number of atoms in one molecule of baking soda (NaHCO3)?

Back

6

Front

What is the best evidence of a chemical reaction when mixing two solutions to produce carbon dioxide?

Back

Formation of bubbles

Front

What type of energy conversion occurs when a runner uses energy from food during a run?

Back

Chemical energy to mechanical energy

Front

Define a chemical reaction.

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What is a reactant in a chemical equation?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical equation?

Back

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

Front

What does the subscript in a chemical formula indicate?

Back

The number of atoms of an element in a molecule.

Front

What is the law of conservation of mass?

Back

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