2
When fire is produce the substance is burned and the obtained substance is having property completely different from previous one.
Ash.
Some do when burned
Smoke
Sure
yes
Fuel
fuel
Certainly. All hydrocarbons produce carbon dioxide when burned.
It turns to ash
An oxide of that element.
The sugar that is burned in the cell to produce energy is glucose. Glucose has energy stored in it's chemical bonds and is used in cellular respiration.