>It is often claimed that cigarettes have hundreds of addatives. Are these chemicals actually added to the product in manufacturing, or is the number derrived from it chemical change of organic matter (C,H, and O recombining in every permutation?)

Chemicals are added to products during manufacturing to improve the flavor, make smoking less harsh, and help the cigarette burn slowly and not go out, among many other reasons. Additional chemicals are produced when cigarettes, including these added chemicals, are burned.