1. The milk turned sour after sitting out on the counter overnight.
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:
Linking verb.
Explanation:
It's not action because an action verb would be in the present tense.
And it's not a helping verb because it just isn't.
There are 27 helping verbs; Am, is, are, was and were, being, been, and be, Have, has, had, do, does, did, will, would, shall, should, may, might, must, can, could.
None of these are went, thus proving that it isn't a helping verb.
There are various ways production pollutes the Earth's environment but, crude oil spills vastly harm living organisms and food production to that keep them alive.
something like that?
