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Oxygen that is dissolved in the water crossed ghe gill menbrane by diffusion. The oxygen is dissolved in the water like carbon dioxide in a beer. This oxygen is not a part of the water molecule. The oxygen in the water molecule is not available to the fish, when dosolved oxygen gets low, yhou have a fish kill.
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How do you separate Hydrogen and Oxygen gases in industrial electrolysis of water process?
In electrolysis, oxygen and hydrogen gas are produced at different electrodes (oxygen at the anode and hydrogen at the cathode). Since these electrodes do not have to be in close proximity, the hydrogen and oxygen will bubble upwards into separate collection vessels. If you needed to separate hydrogen and oxygen once mixed, the easiest way I can think of would be to cool the mixture to ~60K. At this point the oxygen would condense and leave hydrogen gas.
Why do fish use 15 percent of their energy to move water over its gills?
To breath by extracting oxygen from the water.
How much oxygen is in the sea?
Much less than the approximate 21% in the air. Perhaps half that. Fish need a large energy expenditure to strain oxygen from the water. Most of the oxygen produced by phytoplankton, for instance, is vented into the atmosphere.
Can you list out topics for paper presentation on renewable energy?
solar energy is one of the best renewable energy resources and new mechanism to efficiently convert the solar energy to mechanical energy are being developed. Lot of R&D is going on in to this topic in the labs of MIT. It deals with breaking water into hydrogen and oxygen. you can follow it up from this link. http://web.mit.edu/newsoffice/2008/oxygen-0731.html
How many liters of water are needed to react with 2L of oxygen to make water?
Water does not need to react with oxygen to make water!
