Final answer:
The concentration of iodide cannot be determined with provided data as it pertains to iodine. If referring to iodine in the mentioned example, the calculation shows a concentration near 0.1 M but not an exact match to the options given.
Step-by-step explanation:
The concentration of iodide in the solution cannot be determined directly from the information provided. The provided data pertains to iodine (I2), not iodide (I−), and discusses molal concentration, mole fraction, and molarity in different contexts. However, if you mean the concentration of iodine given in one of the examples, where it's stated to be 0.029 g of I2 in 0.100 L of solution, this corresponds to 0.1 M, if we assume the molecular weight of I2 is approximately 254 g/mol. To find molarity, you divide the mass of the solute by its molar mass and then by the volume of the solution in liters. In this case, (0.029 g / 254 g/mol) / 0.100 L = 0.00114 M, which does not exactly match any of the listed options (a) to (d).