you can't oxygen is an element, it cant be made by mixing anything other then oxygen
Oxygen is the gas that is required for respiration.
If you could, then you mix hydrogen and oxygen. Water is H2O, which is hydrogen 2 parts oxygen. Have fun!
Iron and oxygen
Carbon, oxygen and nitrogen.
oxygen
oxygen
Oxygen is the gas needed to make fire. It supports the combustion process by reacting with the fuel to produce heat and light.
They pop and explote make the gas chemicals to spread...
Oxygen
oxygen
Oxygen
oxygen