When mixed, how is it that Oxygen and Hydrogen, two volatile chemicals, put fire out?

a compound has diferent properties to the elements thet make it up(usually)

like table salt, sodium- a slightly harmful reactive metal

chlorine- a poisenous gas

but put them together and it flavours you food and you eat it

water stops the combustion reaction

Hydrogen gas is very flammable/explosive when mixed with Oxygen. Oxygen gas by itself is NOT flammable, it merely is neceary for other things to burn.

When Hydrogen and Oxygen mix to make water, a chemical change occurs which totally alter the properties of the substance. Because of the nature of the bonds, water is a very different substance than either of its two component chemicals.

oxygen and hydrogen aren't simply mixed, covalent bonds bond the atoms together making a single water molecule. since they are together via a covenlent bond, it makes water an excellent solvent.

You answered your own question. They are the two elements that form the water compound H2O.

they make water [h2o] because the h+ and o- are unbalanced.