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.
<span>C is the correct answer. There is an understood you as follows: “for once in your life, [you should] try something new and exciting”. ‘For once in your life’ in this sentence is an adjunct and is extra information given to emphasise the strength of the speaker’s feelings.</span>
Answer:
Similarities Between Rugby and Football Perhaps the greatest similarity between the two sports is how players prevent their opponents from progressing down the field. Both football and rugby require a player to bring their opponent to the ground by tackling them, making the two sports among the most physical games in the world. oblong shaped ball, have to reach other teams “end zone” can kick through uprights for 3pts differences: rugby has no padding. Rugby must have passes sideways or backwards (not forwards) rugby has two 40 minute halves that count upwards like soccer.
Explanation:
Answer:
i think they both attach different surfaces together
they both stick