Question

question 7 (5 points)
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a chemical reaction has the equation 4al (s) + 3 o₂ (g) → 2al₂o₃ (s). what type of reaction is this?
a) synthesis
b) single displacement
c) decomposition
d) double displacement

Explanation:

To determine the reaction type, we analyze the equation \( 4\text{Al}(s) + 3\text{O}_2(g)
ightarrow 2\text{Al}_2\text{O}_3(s) \). A synthesis reaction combines two or more substances into a single product. Here, aluminum (\(\text{Al}\)) and oxygen (\(\text{O}_2\)) combine to form aluminum oxide (\(\text{Al}_2\text{O}_3\)), matching the synthesis pattern. Single displacement involves one element replacing another, decomposition breaks a compound into simpler parts, and double displacement swaps ions between two compounds—none of these fit here.

Answer:

A) Synthesis