The reaction is a substitution reaction since bromide ion was replaced by hydroxide ion.
<h3>What is a chemical reaction?</h3>
A chemical reaction is a change which results in a the permanent rearrangements of the atoms and constituents of a substance such that new substances are formed.
The given reaction is a as follows:

Bromide ion was replaced by hydroxide ion.
Therefore, the reaction is a substitution reaction.
Learn more about chemical reactions at: brainly.com/question/16416932
Do you mean; " A blank is a substance that is made by combining two elements?" (I'm not sure if substances is the right term)
If so then the blank is a compound.
Answer:
Extensibility is a software engineering and systems design principle that provides for future growth.
Explanation:
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Answer:
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Explanation:
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