Question

Which clue can be used to identify a chemical reaction as a decomposition reaction?
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The reaction involves oxygen.
The reaction involves ions.
The reaction has a single reactant.
The reaction has a single product.
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Answer 1

Answer:

The reaction has a single reactant

Explanation:

Decomposition reaction is a reaction in which an insoluble single compound is heated at a high temperature and decomposes into several products.

Typically, we may see decomposition of calcium carbonate producing calcium oxide and carbon dioxide, this is represented by the following reaction:

$CaCO_3 (s)\rightarrow CaO (s) + CO_2 (g)$

Another example would be decomposition of ammonium nitrite. Ammonium nitrite would decompose into nitrogen and water:

$NH_4NO_2 (s)\rightarrow N_2 (g) + 2 H_2O (l)$

Notice that the two examples above share something in common: the two decomposition reactions have a single reactant.

Answer 2

A clue which can be used to identify a chemical reaction as a decomposition reaction is: C. The reaction has a single reactant.

A chemical reaction is a chemical process that involves the rearrangement (transformation) of the ionic, atomic, or molecular structure of a chemical element through the breakdown and formation of chemical bonds, in order to produce a new chemical compound (substance).

In Chemistry, there are five (5) main types of chemical reaction and these include;

• Combination reaction.

• Combustion reaction.

• Single-replacement reaction.

• Double-replacement reaction.

• Decomposition reaction.

A decomposition reaction is a chemical reaction that involves the breakdown of a single reactant (chemical compound) into two or more simpler chemical substances (products). Thus, it is a type of chemical reaction in which a single reactant (chemical compound) yields or produce  two or more simpler chemical substances.

In conclusion, a chemical reaction having a single reactant is a clue that it is a decomposition reaction.

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