Reactions Units Chem in your home

What reaction type is characterized by the reactant breaking down as the reaction progresses?

• Synthesis
• Decomposition
• Combustion
• Double Replacement

What two molecules are produced in a combustion reaction?

• CO₂ + NH₄
• SiO₂ + H₂O
• H₂O + CO₂
• CO₂ + H₂O₂

Which set of coefficients properly balances the reaction below?
_Cu + _H₂O →_ CuO₃ + _H₂

• 1,3,1,5
• 2,6,2,6
• 1,3,1,3
• 1,2,3,4

Which of the following can be categorized as a synthesis reaction?

• Ba + NaCl →BaCl₂ + Na
• KNO₃→K⁺ + NO₃^-
• 2Li + F₂ → 2LiF
• HCl + LiNO₃ → HNO₃ + LiCl

What type of reaction is displayed below?
HCl + NaOH → NaCl + H₂O

• Neutralization
• Combustion
• Double Replacement
• Decomposition

Is the reaction below exothermic or endothermic?
CH₄ + 2O₂ → CO₂ + H₂O + heat

• exothermic
• endothermic

What type of reaction is displayed below?
2Al + Fe₂O₃ → 2Fe + Al₂O₃

• Single Replacement
• Double Replacement
• Synthesis
• Combustion

What type of reaction is characterized by two compounds switching bonding partners?

• Single Replacement
• Combustion
• Synthesis
• Double Replacement

The Law of Conservation of Mass states

• that matter exists in all states and reacts the same
• that matter can only be changed into new substances by introducing a catalyst
• that matter exists in the same state throughout any chemical change
• that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants

What are the reactants in the chemical equation pictured?

• CH₄ and CO₂
• CH₄ and O₂
• CO₂ and H₂O
• O₂ and H₂O