3rd Quarter Chem Test

Which of the following is an example of a synthesis reaction?

• H₂ + O₂ → H₂O

• NaCl → Na + Cl₂

• CH₄ + O₂ → CO₂ + H₂O

• AgNO₃ + NaCl → AgCl + NaNO₃

What type of reaction is represented by the equation: Zn + CuSO₄ → ZnSO₄ + Cu?

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

Why did the decomposition reaction break up?

• It needed some space

• It couldn't handle the pressure

• It wanted to see other elements

• All of the above

Which reaction type involves the exchange of ions between two compounds?

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

What happens when oxygen and fuel walk into a reaction?

• They politely introduce themselves

• They start a heated argument

• They form a stable bond

• They combust spectacularly

(Witty) Why was the chemical equation so confident?

• It had the right balance

• It was in a stable relationship

• It never lost its charge

• All of the above

When balancing a chemical equation, what must remain equal on both sides?

• The number of molecules

• The number of atoms of each element

• The number of moles of reactants

• The total volume

(Witty) Why did the unbalanced equation go to therapy?

• It had too many issues

• It felt incomplete

• It needed to find equilibrium

• All of the above

What coefficient should be placed in front of O₂ to balance the equation: C₃H₈ + O₂ → CO₂ + H₂O?

• 3

• 4

• 5

• None, it's already balanced

Which of the following is a properly balanced equation?

• Na + Cl₂ → NaCl

• 2Na + Cl₂ → 2NaCl

• Na + 2Cl₂ → 2NaCl

• Na₂ + Cl → NaCl₂