When hydrogen and oxygen react during combustion, water vapor is produced.

When hydrogen and oxygen do react to form water, a great deal of energy is released.

In other words, oxygen reacts with other substances, not with itself.

The process is based on oxidation, in which oxygen reacts with other materials.

The oxygen reacts with the hydrogen to form water vapor, which can then be removed by a dryer if necessary.

In order to form water, oxygen must react with hydrogen.

As mentioned previously, hydrogen and oxygen can react in a fuel cell to create electricity.

Once it's going, the oxygen reacts with the iron in the rods to produce terrific heat.

Since oxygen does not react with oxygen it cannot burn.

This oxygen reacts with the metal, forming iron oxide and producing heat.