Answer:
1. Yes
2. Yes
3. and for this one I would need to do some reasearch sorry
Explanation:
1. Sugar can lose mass but that depends on what you do to it
2. Sugar can melt It will melt into a clear liquid at 320 Fahrenheit
3. I don't know But I don't think it can FULLy turn into water molecules although it can mix with water molecules
