0
Anonymous
These denote a family of organic compounds known as aldehydes. Each Aldehyde consists of two groups of which one is CxHyOz.
C is Carbon
H is Hydrogen
O is Oxygen
x, y, z denote the number of atoms in the group bonded together.
Wiki User
food burns because it endures a chemical change, which is why food can be cooked. When food is exposed to to much heat or to heat for long enough, the food will continue this chemical change and burn.