Question 4 (a) Ruthenium is an hcp metal with lattice parameters a = 2.706 , c = 4.282 . Calculate the volume of H2 at STP that would dissociatively adsorb on a unit surface area (1 m) of (a) Ru(0001) (b) Ru (1700)and (c) Ru(1120) surface, if each surface Ru atom binds 1 H atom. (b) Platinum is an fcc metal with a lattice constant 3.92 . Calculate the volume of H2 at STP that would dissociatively adsorb on a unit surface area (1 m2) of (a) Pt(111) (b) Pt(110) and (c) Pt (100) surface, if each surface Pt atom binds 1 H atom