Chem Ch 08 Equations and Reactions

A decomposition reaction is essentially the opposite of what type of reaction?

• single displacement

• combustion

• double displacement

• synthesis

A substance changes the rate of a chemical reaction but can be recovered at the end of the reaction. What is this substance an example of?

• precipitate

• product

• catalyst

• reactant

What type of chemical reaction is represented by the general formula A + BX --> AX + B?

• decomposition

• single displacement

• synthesis

• double displacement

In a chemical reaction, the substances to the left of the arrow represent

• molecules

• reactants

• atoms

• products

Which of the following is NOT generally a physical indication that a chemical reaction has occurred?

• gas production

• color change

• solid formation

• liquid formation

How many total atoms are present in a molecule of the compound (NH₄)₃PO₄?

• 13

• 20

• 4

• 18

What is the coefficient of O₂ when this equation is balanced?

__ KClO₃ (s) --> ___ KCl (s) + ___ O₂ (g)

• 1

• 6

• 3

• 2

When a compound containing hydrogen and carbon undergoes complete combustion, what are the two most common products?

• H₂O and CO

• H₂O and CO₂

• H₂O₂ and CO

• H₂O₂ and CO₂

Which halogen is most reactive?

• Cl₂

• Br₂

• I₂

• F₂

What is the chemical formula for sodium nitrate?

• SNO₃

• NaNO

• NaNO₂

• NaNO₃