How do we know H2O is two part hydrogen one part oxygen?

There are some experiments that can be done that confirm that two parts hydrogen react with one part oxygen to produce water. read more

There are some experiments that can be done that confirm that two parts hydrogen react with one part oxygen to produce water. If you were to mix in a container a volume of oxygen gas and double that volume of hydrogen gas and ignited it, it would all be consumed and turned into water. read more

2 part hydrogen and 1 part oxygen story is about the molecular structure of water. The molecular structure of water is the same irrespective of how it is, stale or fresh, and how it is made among various methods of synthesizing water. read more

When molecular hydrogen (H 2) and oxygen (O 2) are combined and allowed to react together, energy is released and the molecules of hydrogen and oxygen can combine to form either water or hydrogen peroxide. These two processes are represented by the two chemical equations shown at right. read more