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.
What is the questions and yes I have read the story. I'm just confused on what you are asking.
She played on society's fears such as technology and science
The purpose of an essay is determined by your goal as a writer, as well as your subject matter.
Answer:
It was necessary to save as many lives as possible by ending the fighting quickly.
Explanation:
This is the correct answer because President Harry S. Truman literally says, "I stopped the war that would have killed half a million youngsters on both sides." This means that he didn't want people to die, so he ended the war before it got to that point.
