5. what type of reaction is this? fe + o₂ → fe₂o₃
a) synthesis c) single replacement e) combustion
b) decomposition d) double replacement
6. how many total atoms are present in the following compound? c₆h₁₂o₆
a) 6 c) 18
b) 12 d) 24

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Accepted Answer

### Question 5
# Brief Explanations:
A synthesis reaction combines two or more reactants to form a single product. Here, $Fe$ and $O_2$ combine to form $Fe_2O_3$. Decomposition is one reactant breaking into multiple products. Single - replacement has an element replacing another in a compound ($A+BC
ightarrow AC + B$). Double - replacement is $AB+CD
ightarrow AD+CB$. Combustion usually involves a hydrocarbon reacting with $O_2$ to form $CO_2$ and $H_2O$.
# Answer:
A. Synthesis

### Question 6
# Brief Explanations:
In $C_6H_{12}O_6$, the subscripts represent the number of atoms. For carbon ($C$): $6$ atoms, for hydrogen ($H$): $12$ atoms, for oxygen ($O$): $6$ atoms. The total number of atoms is $6 + 12+6$.
# Answer:
C. 18

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