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Two Hydrogen atoms covalently bonded to one Oxygen atom. One of the more common compounds on the surface of the earth.

4 votes

Why does the water go from left to right in this question?

To get an intuitive 'feel' of this, consider a container of water just lying there. Now you made a hole in it. Put your finger on the hole and keep the water from coming out. … Now consider how much you would have to apply if it were a tube with flowing water instead. You can imagine that it would be less. …
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