0.80 mol of hydrogen and 0.60 mol of iodine both in gaseous states were kept in a sealed vessel at a constant temperature for long enough to reach an equilibrium according to the reaction below. At the equilibrium, 1.00 mol of hydrogen iodide was found in the vessel.
H2 (g) I2 (g)⇄2HI(g)
(1) Answer the amount of hydrogen, in moles, in the vessel at the equilibrium to the second decimal place.(2) Calculate the equilibrium constant to the second significant figure.