4 Pentacarbonyl iron (0), Fe(CO)s, was refluxed for 40h with an equal volume of dicyclopentadiene, C₁0H₁. The volatile material was removed in vacuum, and a crystalline compound was obtained by recrystallization of the residue. The molecular weight was determined by freezing point depression in benzene to be approximately 368 g/mole. Elemental analysis proved the following data: C: 47.55; H: 2.85; Fe: 31.52. The IR spectrum is shown below. Suggest a structure for the compound.

A lab prepared a solution of sulfuric acid with a volume of 5.0x10-4 m3. The solution is further concentrated to the half of the original volume, which is used to neutralize a potassium hydroxide solution. The potassium hydroxide solution has a volume of 30 mL, contains 30 g water, and has a density of 1.0141 g/cm3. What is the molarity of sulfuric acid in the concentrated solution? (The final answer keeps 4 digits after decimal. Please do NOT use scientific notation.)

Report your answer to 3 significant figures in scientific notation (example: 1.23E+4) unless stated otherwise. DO NOT include the units in your answer. 1. Consider a reaction of 827 mL of a 6.14×10-2 M K,S04 solution completely reacts with 131 mL of a 3.54x102 M CaI, solution according to the following UNBALANCED chemical equation. K2SO4(aq) + Cal2(aq) → CaSO4(s) + KI(aq) (a) Balance the chemical equation using the lowest integer coefficients. Be sure to include all coefficients including those of 1. 1 K2SO4(aq) + 1 Cal2(aq) 1 CaSO4(s) + 2 KI(aq) You are correct. Your receipt no. is 155-6200 ? Previous Tries (b) Determine the mass (in g) of CaSO4 that is formed in the reaction. Report your answer to 3 significant figures in standard notation (example: 1.23). g Submit Answer Tries 0/99 (c) If 3.58x10-1 g of CaSO4 is produced, what is the percent yield of the reaction? Report your answer to 3 significant figures in standard notation (example: 1.23).

Sample 1 Sample 2 Sample 3 Mass of Erlenmeyer Flask (g) 24.33 24.37 24.44 Mass of Erlenmeyer Flask + Calcium Hydroxide Solution (g)   (g)(lime water) 27.22 27.29 27.33 Mass of Calcium Hydroxide Solution (g) 2.89 2.92 2.89 Volume of Ca(OH)2 Density = 1.000 g/mL 2.89 2.92 2.89 Concentration of HCl (M) 0.1 0.1 0.1 Initial HCl Volume in Syringe (mL) 1.00+1.00 1.00+1.00 1.00+1.00 Final HCl Volume in Syringe (mL) .72 .66 .54 Volume of HCl Delivered (mL) 1.28 1.34 1.46 Moles of HCl Delivered       Moles of OH- in Sample       Moles of Ca2+ in Sample       Molar Solubility (M)       Calculated Ksp       Average Calculated Ksp       I am very confused how to solve the blank spots in the table. Everything including and after "Moles of HCl Delivered" confuses me. Please help me figure out how to solve the sections correctly. Also feel free to…