Posted by Gregg on Saturday, July 17, 2010 at 4:38am.
2.0 x 10^23 molecules of oxygen (O2) contain 4.0*10^23 atoms of O, and will make that many (4.0*10^23) molecules of H2O.
Similarly, 22.5 moles of O2 aill make 45 moles of H2O, assuming a sufficient amount of H2 is also provided.
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