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Problem- At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.200 M and [NO]=0.400 M.

N2(g)+)2(g) <=> 2NO(g)

If more NO is added, bringing its concentration to 0.700 M, what will the final concentration of NO is after equilibrium is re-established?

Please define why you think that's the right answer

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