As fuel is burned in an airplane, it seems to disappear from the tank, suggesting that matter is destroyed during the reaction. Identify the scientific law that is of importance here. Explain why this is not true, and describe where the matter goes.

David has two containers of two different gases at the same temperature and pressure. david could assume all of following except a. when the temperature is increased, the volume of both containers will increase b. when the pressure is increased, the volume of both containers will decrease c. both containers contain the same number of gas particles d. when the pressure is decreased, the temperature of both containers will increase