Question \# 10:. Write down the Lewis structures of the following molecules, according to the steps explained in class. Also do the formal charge calculation and indicate the non-zero FC on the atoms in the final structure: a. AlCl3 b. SO3 c. [BF4] d. XeF2 Question \# 11: Using the bond enthalpy table below, compute the enthalpy change involved when one mole of butadiene is burned, represented by the following reaction: H2C=HCHC=CH2+(11/2)O24CO2(g)+3H2O Question \# 12: Consider the formation of MgO (s). Assume that Hr and Sr are independent of temperature. Mg(s)+1/2O2(g)MgO(s)Hr=602kJ/molSr=108JKmol1. a) Calculate G; for the formation of MgO(s) at 0C(273K). Is the reaction spontaneous or non-spontaneous at 0C ? b) Is there a temperature at which the formation of MgO switches from spontaneous to non-spontaneous or vice versa? If no, explain briefly why not. If yes, calculate the temperature (T) at which the spontaneity of the reaction switches. Question \# 13: Consider the molecule NF3(g) with a Gf=90.6kJ/mol and Hf=132.1 kJ/mol a) Calculate G and H for the following reaction at 298K. N2(g)+3F2(g)2NF2(g) Question \# 14: The enthalpy change of the following reaction at standard conditions and 298.15 K is 114.38kJ. The free energy change of the following reaction at standard conditions and 298.15K is 75.92kJ