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For the following equilibria, calculate the value of Kc and determine whether the equilibria exists mostly...

For the following equilibria, calculate the value of Kc and determine whether the equilibria exists mostly as reactants, as products or about equal amounts of both. All concentrations are at equilibrium.

a) 2 NO(g) + O2(g) 2 NO2(g)
[NO] = 0.0020 M, [O2] = 0.010 M, [NO2] = 0.100 M
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