Answer:
it would become darker. there would be a higher level of water pressure. and there would be less animals, or different alimals.
Answer:
2 elements
Explanation:
Octane is composed of carbon and hydrogen atoms.
Question:
Along with water, what is a product of the reaction?
Answer:
HCl + KOH ---> KCl + H20
An element is all the same thing. Pure, if you will.
The first one is definitely an element. The second would be a compound (it's atoms are different colors). I would say the last one is an element, since it has ll the same color of atoms.
I hope this helped you! If you have anymore questions, feel free to ask me.