At 298 K the equilibrium constant for is

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

Problem

At 298 K the equilibrium constant for N2O4(g)⇌2 NO2(g)\text{N}_2\text{O}_4(g)\rightleftharpoons 2\,\text{NO}_2(g) is Kc=4.6×10−3K_c = 4.6\times10^{-3}. A container initially holds [NO2]=0.800 M[\text{NO}_2]=0.800\,\text{M} and no N2O4\text{N}_2\text{O}_4. What is the equilibrium concentration of NO2_2? (a) 0.791 M0.791\,\text{M} (b) 0.0020 M0.0020\,\text{M} (c) 0.042 M0.042\,\text{M} (d) 0.059 M0.059\,\text{M}

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