Chemical Reactions Review

What type of reaction is this? LiBr₂ + K₂CO₃ ==> LiCO₃ + KBr

• single replacement

• double replacement

• decomposition

• synthesis

• combustion

What type of reaction is this? Al₂O₃ ==> Al + O₂

• single replacement

• double replacement

• decomposition

• synthesis

• combustion

What type of reaction is this? N₂ + H₂ ==> NH₃

• single replacement

• double replacement

• decomposition

• synthesis

• combustion

What type of reaction is this? Li + NH₃ ==> Li₃N + H₂

• single replacement

• double replacement

• decomposition

• synthesis

• combustion

What type of reaction is this? C₄H₉OH + O₂ ==> CO₂ + H₂O

• single replacement

• double replacement

• decomposition

• synthesis

• combustion

What is the one necessary reactant in a combustion equation in addition to a substance

• oxygen

• carbon dioxide

• water

• fire

What are the three most common products of a combustion reaction?

• H₂O

• CO₂

• OH

• heat

The only thing you can manipulate when balancing equations are the ________.

• coefficients

• subscripts

• number of reactants

• number of products

What is the law of conservation of mass?

• the total mass of the reactants before a chemical reaction is the same as the total mass of the products after a chemical equation

• the reactants will always be heavier than the products if the reaction produces heat

• the products will always be heavier than the reactants if the reaction absorbs heat

• the mass of the reactants and the products will always be different because they are different compounds

Is this equation balanced? 2Al + 3Cl₂==> 2AlCl₃

• yes

• no