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.
The correct answer is B. We knew a storm was likely; the air was hot, humid, and absolutely still.
Explanation:
John Lewis became devoted to pursuing his personal educational objectives and prosperity for his country. He coincided to Dr. Martin Luther King, Jr., who vowed to pursue the civil rights movement after being motivated by his instance in the Bus boycott.
A. true, psychographics is essentially the study of people, and people have different attributes if they are a certain age, gender, education level, etc.
