Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium concentration of NO2(g).
N2O4(g) ? 2 NO2(g), Kc = 0.21
[N2O4]eq = 0.039 M
1)7.8 × 10-2 M
2)11 M
3)8.2 × 10-3 M
4)1.22 M
5)9.0 × 10-2 M