3. (10 points): suppose you have a metal at room temperature (293 k) and open to the at- mosphere (1.00 atm, with partial pressures 0.80 atm for n2 and 0.20 atm for o2). each site on the metal has equal probability that it is unoccupied, that it is populated with an oxy- gen molecule, and that it is populated with a nitrogen molecule (probability 1/3 for each possibility). given this information, find the bond energies of oxygen and nitrogen on the metal.