Acetylene is hydrogenated to form ethane. the feed to the reactor contains 1.50 mol h2/mol c2h2. (a) calculate the stoichiometric reactant ratio (mol h2 react/mol c2h2 react) and the yield ratio (kmol c2h6 formed/kmol h2 react). (b) determine the limiting reactant and calculate the percentage by which the other reactant is in excess. (c) calculate the mass feed rate of hydrogen (kg/s) required to produce 4 106 metric tons of ethane per year, assuming that the reaction goes to completion and that the process operates for 24 hours a day, 300 days a year. (d) there is a definite drawback to running with one reactant in excess rather than feeding the reactants in stoichiometric proportion. what is it? [hint: in the process of part (c), what does the reactor effluent consist of and what will probably have to be done before the product ethane can be sold or used? ]