At 350 ,K a 1.0 ,L flask initially contains 0.500 ,mol of and no

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

Problem

At 350\,K a 1.0\,L flask initially contains 0.500\,mol of N2O4(g)\mathrm{N_2O_4(g)} and no NO2(g)\mathrm{NO_2(g)}. The system reaches equilibrium according to N2O4(g)⇌2NO2(g)\mathrm{N_2O_4(g) \rightleftharpoons 2NO_2(g)} with Kc=0.36K_c = 0.36. What percentage of the original N2O4\mathrm{N_2O_4} has dissociated at equilibrium? (a) 42\% (b) 34\% (c) 17\% (d) 68\%

Related theory

Browse the problem library