How many iron atoms are contained in 354 g of iron?

May someone me with these science questions

The reaction below shows a system in equilibrium. how would a decrease in temperature affect this reaction? a. the rate of formation of the gases would increase. b. the equilibrium of the reaction would shift to the left. c. the equilibrium would shift to cause the gases to sublime into solids. d. the chemicals on the left would quickly form the chemical on the right.

Ajar is tightly sealed at 22°c and 772 torr what is the pressure inside a jar after its been heated to 178°c