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Consider the following gas-phase equalibrium reaction: N2(g)+O2(g)<-->2NO(g); Kc=4.10x10^-4 at 2000 degrees C. If 6.0 mol of NO is introduced into a 1.0L container at 2000 degrees C, what is the concentration og NO when equalibrium is reached?
A. 6.0E-2 M
B. 6.0E0 M
C. 3.0E0 M
D. 2.5E-3 M
E. 6.0E-2 M

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