Answer:
Solar Power, HEP (Hydroelectric Power), Wind Power, etc...
Explanation:
These are some common examples of renewable energy source.
I'm not entirely sure but i think it's Se2-
Answer: 
Explanation: A double displacement reaction is one in which exchange of ions take place.
The compounds which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
Thus the exchange of ions take place and all the compounds are soluble so the chemical formulas are followed by the symbol (aq).
Answer:
A
Explanation:
has properties that are different from the original substances.