Please let me know whether did I chose the correct answer for the following pictures. Please answer it with your knowledge not for the points, I really need this, thanks!!

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?

Kp is the equilibrium constant for dissociation of the propionic acid dimer. what is the sign of the slope for a plot of the natural logarithm of kp vs. inverse temperature for this reaction?

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these