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:
Why does Douglass consistently use the pronoun "your" in this speech? He is creating the separation between the slave and the free whites if slavery were to continue it would be the death of America would lead to war this is Identify these elements. What feelings is he appealing to in his audience in this section?
Explanation:
Hope this helps
Answer:
the answer is D no. the woman whose son u just talked with is korean.
Answer:
Biomes around the world, written by University of Chicago environmental scientists in 2018 for high school classes
Explanation:
This is the best option because the first option was written by a student on a blog and is therefore not as reliable as the second source.
The last two options do not talk directly about biomes, which is what the project is about, making them poor options as well.
The second source is reliable and pertains to the topic, making it the best choice.
