Simple you take the largest percent and divide by the smallest percent to get the subscript for that element. So you should get

and just F.
Answer:B
Explanation:
Atoms and molecules are always moving or vibrating. (just took the test)
the one that is wrong is a. increase the molecular weight of the gas , the molecular weight never changes when a solid turns to a liquid or when a liquid turns to a gas .
Supersaturated is the correct answer
It's a weak base bacause H C N is weak