a) Hydrogen adsorbs dissociatively on most d-metals, e.g., Pt and Rh; explain why, based on the very simple molecular orbitals of the dihydrogen molecule. b) Pt is a catalyst for the (simplified) reaction: NO + H2 NH,OH The surface of the Pt particles contains identical sites only; propose and moti- vate a scheme of elementary reaction steps for this overall reaction, according to the Langmuir-Hinshelwood mechanism. c) Derive a rate equation, assuming that the first surface reaction is rate deter- mining d) Assuming that NO adsorbs much stronger than hydrogen, what would be the apparent order of the reaction in hydrogen and NO? Motivate your answer. e) In the case of d, what would be the effect (if any) of further increasing the strength of adsorption of NO on the experimental activation energy? Motivate your answer with an energy diagram