When determining the equilibrium concentrations for the reaction [tex]AB(g) \rightleftharpoons A(g) + B(g)[/tex]; [tex]K_c = \frac{[A][B]}{[AB]}[/tex] a simplifying assumption can be used under certain conditions to avoid solving a quadratic equation. [tex]K_c = \frac{x^2}{[AB]-x} \approx \frac{x^2}{[AB]}[/tex]Classify each situation by whether the simplifying assumption can be used or whether the quadratic formula is required.Use simplifying assumptions - Quadratic formula required 1. [AB] = 0.0178 M; [tex]K_c = 2.35 x 10^{-6}[/tex]2. [AB] = 0.00204 M; [tex]K_c = 1.52 x 10^{-6}[/tex]3. [AB] =0.451 M; [tex]K_c[/tex] = 0.000905 4. [AB] = 0.0174 M; [tex]K_c[/tex] = 0.0000925 5. [AB] = 0.396 M; [tex]K_c[/tex] = 0.00228