Question

CHEMISTRY 171: PROBLEM SET #6 (11/8/19) Due: Monday, November 18, 2019 1. How could you tell the difference between a. A crystal of cubic zirconia and a diamond b. A synthetic ruby and a natural ruby 2. Give the chemical formula for a. cubic zirconia b. sapphire c. emerald 3. Describe the structure of white, red and black phosphorus. What happens when white or red phosphorus is exposed to air? Why did it take 10 years to determine that ducks on a military artillery range died from phosphorus poisoning? 4. Which Xe fluorides exist and which ones can be made under ambient conditions in sunlight? Which Xe oxides exist and are they stable? 5. Which of the following complexes obey the 18-electron rule (EAN rule)? a. Cu(NH3)4**. Cu(en)3. Cu(CN) b. HC(CO): . Co(H2O).. CoBr. c. Pt(CN) . Pu(NH3)Cl2 . Pt(NH3)2+ d. Fe(CO)(en). Fe(CN).. Fech 6. On the basis of EAN rule, identify the first-row transition metal for each of the following: a. [M(NH3).] b. H:CM(CO) c. M(CO)(PPh3)Br d. [M(CN):)" e. [M(CO)l(en)] f. [M(CO). g. [M(CN) (H:0):)** 7. On the basis of the 18-electron rule, determine the expected charge (shown below as "z") and the number of d electrons on the following: a. [Ru(CN)) b. [PIC16) c. (Co(CO)) d. [Ni(CO) e. (Mn(CO)] f. [Fe(CsHs)] 3. [W(CO) BONUS: Which element forms the most compounds? Which element forms the second most compounds? Why? BONUS #2: Design a superconducting endohedral fullerene.

Answer 1

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