Chemical Reactions

Front

What are the substances called that are present on the left side of a chemical equation?

Back

Reactants

Front

What type of chemical reaction absorbs heat from its surroundings?

Back

Endothermic reaction

Front

How do you balance the chemical equation Al2O3 --> Al + O2?

Back

2Al2O3 --> 4Al + 3O2

Front

What is the balanced form of the equation HNO2 + O2 --> HNO3?

Back

2 HNO2 + 1 O2 --> 2 HNO3

Front

True or False: In a chemical reaction, atoms are created and destroyed.

Back

False

Front

What is the term for a chemical reaction that releases heat?

Back

Exothermic reaction

Front

What is the law that states that matter cannot be created or destroyed in a chemical reaction?

Back

Law of Conservation of Mass

Front

What is the general form of a chemical reaction?

Back

Reactants --> Products

Front

What is the purpose of balancing a chemical equation?

Back

To ensure that the number of atoms for each element is the same on both sides of the equation.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a compound to indicate how many molecules are involved in the reaction.