Answer:
A. Bubbles formed
Explanation:
When a student added a piece of limestone to a solution of hydrochloric acid, bubbles are formed.
The bubbles are as a result of the CO2 gas that is formed.
Below is the reaction:
CaCO3+2HCl → CO2+H2O + Ca++ + 2Cl-
From the left hand side, we can see that the reaction is with limestone and hydrochloric acid. Their reaction forms carbon dioxide gas (CO2), water (H2O), dissolved calcium (Ca++) and dissolved chlorine (Cl-) on the right hand side.
With due observation, bubbles will be seen evolving from the reaction. These bubbles formed is the carbon dioxide gas which reveals that a reaction is taking place.
Any kind of fictional scenario you create doesn't require you to consider your characters.
<h3>How may a setting be created for a story?</h3>
A story's setting specifies where and when its plot takes place through the use of literary devices. A story setting, also referred to as a background, can be created from nothing or be based on actual places and times in history (such as a specific city, or the house of a character).
This is produced by the interactions between the characters and their surroundings. Even though it makes sense, adapting this to the surroundings is predictable. When designing your setting, you must carefully evaluate these and decide where to put them.
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I believe it is the second one.
