Unit 8 and 9 Test Part 1

A decomposition reaction occurs when...

• the chemical bond of a compound breaks, forming two elements.

• A reaction occurs when two elements combine.

• A reaction occurs when energy is released.

• A reaction occurs when a catalyst is added.

• Decomposition

• Combustion

• Single-Replacement

• Synthesis

The chemical reaction is balanced when the

• reactants and products are not equal in mass

• same number of each kind of atom appears in the reactants and in the products

• reactants and products have the same energy

• products and reactants are the same chemicals

• Combustion

• Neutralization

• Decomposition

• Oxidation

• 5,3,1

• 4, 3, 2

• 6,2,1

• 3,4,2

• 3, 2, 2

• 5, 1, 2

• 4, 1, 1

• 2, 3, 1

• 1, 2, 3

• 2, 1, 2

• 3, 1, 4

• 4, 2, 6

• 1, 1, 1, 2

• 2, 1, 2, 1

• 1, 2, 1, 2

• 2, 2, 2, 1

• 2:3

• 3:4

• 5:6

• 4:3

How does a balanced chemical equation satisfy the Law of Conservation of Mass?

• During the chemical reaction, the mass increases

• During a chemical reaction, the total amount of mass stays the same.

• During the reaction, mass is destroyed

• During a reaction, one or more new substances are formed