For the equilibrium at 350 K

CHEMISTRY · Single correct · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)

Problem

For the equilibrium N2O4(g)  ⇌  2 NO2(g)\text{N}_2\text{O}_4(g) \;\rightleftharpoons\; 2\,\text{NO}_2(g) Kc=0.25K_c = 0.25 at 350 K. A 2.0 L flask is charged with 0.40 mol of NO2_2 and 0.10 mol of N2_2O4_4. What is the equilibrium concentration of NO2_2? (a) 0.22 M0.22\,\text{M} (b) 0.18 M0.18\,\text{M} (c) 0.14 M0.14\,\text{M} (d) 0.15 M0.15\,\text{M}

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