help with chemistry. thermodynamics.?

[stephaniep09]

HELP ME!! i need all work shown if you chose to respond to this question. ASAP if you could.

2Fe(s) + 3/2O2(g) ------> Fe2O3(s)

Iron reacts with oxygen to produce iron(III) oxide, as represented in the equation above. A 75.0 gram sample of Fe(s) is mixed with 11.5 L of O2(g) at 2.66 atm and 298 K.
a.) calculate the number of moles of each of the following before the reaction begins.
(i)Fe(s)
(ii)O2(s)
b.)identinfy the limiting reactant when the mixture is heated to produce Fe2O3(s). Support your answer with calculations.
c.) Calculate the number of moles of Fe2O3(s), produced when the reaction proceeds to completion.
d.) the standard free energy of formation of Fe2O3(s) is -730. kJMol-1 at 298K.
(i)calculate the standard entropy of formation of Fe2O3 at 298K. include units with your answer
(ii)which is more responsible for the spontaneity of the formation reaction at 298K, the standard entahlpy of formation or the standard entropy of formation. justify your answer.