At 500 °C, hydrogen iodide decomposes according to   2HI(g)↽−−⇀H2(g)+I2(g) For HI(g) heated to 500 °C in a 1.00 L reaction vessel, chemical analysis determined these concentrations at equilibrium: [H2]=0.395 M , [I2]=0.395 M , and [HI]=3.34 M . If an additional 1.00 mol of HI(g) is introduced into the reaction vessel, what are the equilibrium concentrations after the new equilibrium has been reached?

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