Question

a. single replacement c. synthesis/combination e. combustion
b. double replacement d. decomposition

1. 1 fe₂o₃ + 3c →2fe + 3co

a. single replacement c. synthesis/combination e. combustion
b. double replacement d. decomposition

1. 1c₄h₈ + 6o₂ → 4co₂ + 4h₂o

a. single replacement c. synthesis/combination e. combustion
b. double replacement d. decomposition

1. 1znco₃ → 1co₂ + 1 zno

a. single replacement c. synthesis/combination e. combustion
b. double replacement d. decomposition
part 2: physical and chemical property and change questions.

1. physical properties are:

a. those that a substance displays only through changing its composition.
b. those that cause atoms and molecules to change.
c. those that a substance displays without changing its composition.
d. identical for all solid matter.
all of the following are physical properties except
a. taste.
b. color.
c. flammability (ability to burn).
d. density.

Explanation:

Question 5

In the reaction $\ce{Fe_{2}O_{3} + 3C
ightarrow 2Fe + 3CO}$, carbon (C) replaces iron (Fe) in iron(III) oxide ($\ce{Fe_{2}O_{3}}$). A single replacement reaction is when one element replaces another in a compound. So this is a single replacement reaction.

The reaction $\ce{C_{4}H_{8} + 6O_{2}
ightarrow 4CO_{2} + 4H_{2}O}$ is a combustion reaction. Combustion reactions involve a hydrocarbon (like $\ce{C_{4}H_{8}}$) reacting with oxygen to produce carbon dioxide and water.

In the reaction $\ce{ZnCO_{3}
ightarrow CO_{2} + ZnO}$, a single compound ($\ce{ZnCO_{3}}$) breaks down into two simpler substances ($\ce{CO_{2}}$ and $\ce{ZnO}$). This fits the definition of a decomposition reaction.

Answer:

a. Single Replacement

Question 6