If the substance is burning in air then the gas is Oxygen (O2) which makes up about 20% of the Earth's air.
Oxygen.
oxygen
O2 I think
air and gas
when two substances react a chemical change occurs
The ability to react with other substances is a chemical property.
Normally only 20% oxygen in air can react e.g. burning, corrosion, or other oxidative reactions. The other 80% is nitrogen and traces of carbon dioxide (<1%) and some others are more or less inert.
Other Substances
This is a badly worded question, I believe "burning" requires the oxygen in air. Substances such as Phosphorus react with air to burn, and may continue this reaction when submerged. But I do not believe this is what you mean
carbon monoxide is already toxic the way it is made by the car.nitrogen oxides react with water vapor in the air and sunlight to make nitric acid!unburned hydrocarbons react with sunlight to produce the haze of smog.
air and gas
Nitrogenis the gas you are looking for.This gas make's up most of the air, it dose not react much.A burning splint will go out in this gas.
magnesium look like white powder after burning in air. magnesium burns in air n react with atmospheric oxygen n forms magnesium oxide which is a white powder.
the things that do not contribute to increased air quality are volcanic activities, factory smoke and also burning of substances
when two substances react a chemical change occurs
Argon is an inert gas and doesn't react with other substances from the reactor.
A fuel is a chemical substance that can react with the oxygen in air to form new substances and release energy. Water can not react with the oxygen in air as it is already an oxide. It has no molecular energy stored in it to release.
Nitrogen
The ability to react with other substances is a chemical property.
it is when the fuel burnt and smoke comes out from the exhaust.gases mix mix with other substances in the air poisonous gas is produced. it lower the quality of the air we breathe. by RYANZAR_FUERZAS