2) Molybdenum carbides are efficient catalysts for taking the nitrogen out of molecules in crude osk as ammonia. Prior to use as a catalyst, the molybdenum castide should be reduced usiog hydrogen. A) (2 pts.) I. ist two interstitial elements in the molybdenum carbide catalyst. B) (4 pts.) What positions in a Mo carbide catalynt are likely places for reaction to take place? What efrect does planar density have on the catalytie reactivity of a material? Where might the molecules stick? C) (9 pts.) Assume the diffusivity of carbon atoms through Mo carbide obeys the following relationship: that the Mo carbon has a crystal diameter of 3nm and is an active catalyst at 600K. and that the activation energy for diffusion is 38000J/ mole. First, estimate the diffusivity of carbon in m2/sec. D=1.4105exp(Eand(8.314T)), where D for carbon is in m2/ sec and T is in K. Then, using the dimensionless group relationship you learned with regard to diffusion, estimate the amount of time that it would take the carbon to diffuse the length of the diameter of the crystal, assuming that if the dimensionless group is approximately one, then the carbon atom had sufficient time to diffuse across the entire diameter of the crystal. D=1.4108exp((8314)(600)38000)