At 298 K the reaction 2NO(g) + O2(g) ⇌ 2NO2(g) has

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 reaction 2NO(g) + O2(g) ⇌ 2NO2(g) has Kc=1.2×106K_c = 1.2\times10^{6}. What is KcK_c for the reaction NO2(g) ⇌ NO(g) + 12\tfrac{1}{2}O2(g) at the same temperature? (a) 4.6×10−44.6\times10^{-4} (b) 1.1×10−31.1\times10^{-3} (c) 9.1×10−49.1\times10^{-4} (d) 1.8×10−31.8\times10^{-3}

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