12. A metal with atomic radius of 180pm crystallizes in the face centered cubic unit cell. What is the edge length of the unit cell of this metal? A. 416pm B. 511pm C. 360pm D. 77.9pm$90.0pm 13. A 14.7 percent by mass solution of organic compound in Benzene boils at 85.66C. Determine the molar mass of the compound. Boiling point of Benzene is 81.1C. The boiling point elevation constant for Benzene is 2.53C/m. A. 81.1g/mol B. 85.5g/mol C. 9.69g/mol (D.) 79.2g/mol E. 75.5g/mol 14. The normal boiling point for anaqucous solution of BaCl2 is 103.15C. What is the normal freezing point of this solution? A. 4.15C B) 11.8C C. 7.72C D. 13.5CE15.1C 15. Which of the following will exhibit dipole-dipole force? A. SO2 B. XeCl4 C. Nal D. BCl3 E. CO2 16. Which of the following will exhibit Lond fn dispersion force? A. CH3NH2 B. SF6 C. COCl2CH2Cl2 E CHCl3 Show all works for the following questions: 17. A metal with density 18.60g/cm3 crystallizes in body-center center cubic unit cell. What is the atomic weight of the metal with edge length of unit cell of 1.60105cm ? Dore 18. Consider the reaction CH3CHOCH4+CO The reaction is initiated with 1.50M in CH3CHO. What is the concentration of CH3CHO remaining after