This would be an example of a physical change. The salt is still salt, it just dissolved.
The empirical formula of asorbic acid would be
for this problem. What you end up doing is determining the simplest whole number ration by dividing by the smallest molar amount. If you need help with this kind of problem chemwiki has great examples. ( http://chemwiki.ucdavis.edu/Textbook_Maps/General_Chemistry_Textbook_Maps/Map%3A_Chemistry%3A_The_Ce...)
The answer is "the ice-caps" from the north and south pole.