Physical, because the ice is only changing it's state. It's not changing to a new substance.
Answer:
Basically, fragrances reach other person through sense of smell. So, the strength of the fragrances depends a lot on its evaporation, which is strongly related to the boiling point. Esters with higher molecular weight do not have a strong fragrance because it has a higher boiling point.
Well, first we must remember that

This is because


So then

Explanation:
Percentage composition = 2/18 = 11.11%.