Chemical Equations

The total amount of matter (atoms) before and after a chemical reaction (change), remains the same.

• True

• False

The coefficient in 3H₂O is __________________

• 6

• 2

• 3

• 5

C₄H₆ + 3O₂ ---------> 4CO₂ + 3H₂O is a

• Decomposition reaction

• Combustion reaction

• Single displacement

• Double displacement

• Synthesis or composition

CO₂ ---------> C + O₂ is a ____________________ reaction

• Synthesis

• Decomposition

• Single displacement

• Double displacement

• Combustion

FeBr₂ + Cl₂ ------------> FeCl₂ + Br₂ is a ______________________

• Decomposion reaction

• Single displacement

• Double displacement

• Synthesis

• Combustion

A precipitate is

• a liquid that forms when two solids react

• a gas that forms when vinegar and baking soda react

• a change of color in a solution

• a solid that forms when two liquids react

A catalyst is a substance that

• slows down the rate (speed) of reactions

• a reactant that makes new products

• speeds up the rate (speed) of reaction

• increases the products in a reaction

The product for the following chemcial equation is:

N₂ + H₂ -->

• N₂H₂

• NH₃

• N₂H₃

How many nitrogen atoms does 2HNO₃ have?

• 3

• 1

• 6

• 2

What is the reactant in the following equation?

2NaHCO₃ -> Na₂CO₃ + CO₂ + H₂O

• CO₂

• H₂O

• Na₂CO₃

• NaHCO₃