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.
Answer:
i cant understand the question
SORRY pls explain me
Answer:
The guidelines and transition that the author uses are the textual structures used in the text.
Explanation:
In “Kinds of Discipline," the author uses the textual structure as a guideline for transition, so he manages to move from one paragraph to another in a coherent and organized way, promoting a fluid and cohesive text. In this text, the author uses the order/sequence structure to show the types of discipline that children are subjected to, in addition to using the descriptive structure to explain and describe these disciplines.
