Q-6. Phosgeno, a substance used in poisonous gas warfare during World War I, is so named because it was first prepared by the action of sunlight on a mixtue of carbon monoxide and chlorine gases. Its name comes from the Greek words phos (light) and genes (bom of). Phosgene has the following clemental composition: 12.14%C, 16.17% 0 and 7169% Cl by mass. Its molar mass is 989 g/mol [12 points) (a) Determine the molecular formula of this compound (b) Draw three Lewis structures for the molecule that satisfy the octet rule for each atom (The Cl and O atoms bond to C) (c) Using formal charges determine wuch Lewis structure is the dominant one. (4) Usang average bond enthalpes, estimate H for the formation of gascous phosgene from CO(g) and C1) Q7. Which has the lowest first ionization energy. B.Al, Cor Si? Which has the highest points) Q.S. Write the electron configurations for (a) Gal. (b) Cr, and (c) Br 16 points) Q 9. Use the periodic table to write the condensed electron configuration for 4 points) (a) Co (element 27). (6) In (element 49)