ONLY PART (b) In its entirety please! Also, if you have time, for part a do you just only use the morality information?

a) In a study of the properties of an aqueous solution, a freezing-point depression of 0.0569K was observed for an aqueous solution of molality 6.7mmolkg1. What is the apparent number of ions per formula unit? b) 5.00g of an organic solid is dissolved in 100.0g of benzene. The boiling temperature of this solution is 82.42C. The organic compound is 15.72% nitrogen, 7.92% hydrogen, 35.92% oxygen and the remainder is carbon. The boiling temperature of pure benzene is 80.1C;Kb= 2.53Ckg/mol i. Determine the molecular weight of the organic solid. ii. Determine the molecular formula of the solid. iii. Determine the mole fraction of the organic solid in the solution. iv. If the density of this solution is 0.8989g/mL, calculate the molarity of the solution. Hint: use an online empirical formula calculator to calculate the formula for the organic acid solute