Answer
This solution is supersaturated.
Work Step by Step
Since the solubility of Cr(NO$_{3})_{3}$ $•$ $9H_{2}O$ is 208g per 100g of water (under the given conditions) and the resulting solution has 324g of Chromium (III) Nitrate per 100g of water, the solution must be supersatured because the solution contains a greater amount of solute than needed to form a saturated solution (208g of Chromium(III) Nitrate per 100g of water is need to form a saturated solution).
