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Which is the correct formula for nitrogen (1) oxide?
A. NO.
B. N2O.
C. NO2.
D. N2O3.
The oxidation number for Oxygen (O) is -2 and the oxidation number for Nitrogen (1) is +1. Since this is a compound, the oxidation numbers of the atoms in the compound must equal zero. In N2O, note how N (2)( +1) or a +2 charge will cancel out the -2 charge of one oxygen ion.
 
 
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Added: 6/29/2008
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Biological Sciences II (non MCAT Format)
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While these questions do not fit the MCAT format (they have no related reading passages) they cover concepts one should understand in order to do well in the biological sciences portion of the MCAT.
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