Gaseous hydrogen reacts with gaseous iodine to produce gaseous hydrogen iodide. $\text{H}_2\text{(g)} + \text{I}_2\text{(g)} \rightleftharpoons 2\text{HI}\text{(g)}$ For an experiment, $2.0\,\text{mol}$ of hydrogen and $2.0\,\text{mol}$ of iodine are introduced into a sealed container with a volume of $1.0\,\text{dm}^3$. The $K_c$ for this reaction at the stated conditions is $9.0$. What number of moles of hydrogen iodide is present when equilibrium is reached?
- A$0.57\,\text{mol}$
- B$1.2\,\text{mol}$
- C$1.5\,\text{mol}$
- D$2.4\,\text{mol}$