. Calculate the pH of a solution made by dissolving 1.87 g of sodium caproate, NaC6H11O2, Kb = 7.58 x 10-10, in water and diluting to a total volume of 500.0 mL.

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.