# physics

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Suppose that you are able to decompose water into hydrogen gas and oxygen ga and that ou can capture all of these gases that are produced. knowing that the mass of an oxygen atom is 8 times that of a hydrogen atom, describe how you could determine which of the two types of molcules (Ho or H20) represents water.

• physics -

The mass of H is 1. The mass of O is 16. That isn't 1:8. I suppose you intended to say that mass of oxygen IN H2O is 8 times that of a H atom. But does that matter?
If the formula is HO, you will obtain equal volumes of H and O.
If it is H2O, you will obtain twice the volume of H as that of O (T and P being the same). I think the 8 times stuff is a red herring.

• physics -

I forgot to say to check my thinking.

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