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.
If you mean the quotient of m divided by 7, then it should be m/7, because it is in its most simplified form.
Answer:
The apples were bright red, but they didn't taste good.
Explanation:
The author of the sentence is showing a statement contrary to the statement that has already been said, in which case, the two statements must be joined with words like "but" and "entertaining". In addition, we must pay attention to the fact that words like "but" and "meanwhile" must accompany a comma that must be placed before these words.
In this case, the only correct alternative is: "The apples were bright red, but they didn't taste good."
The answer to your question is A- is
Answer:
a
Explanation:
The description emphasizes the differences between the cultures.
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