In the combustion of C6H10O4 how much in grams could you produce of this hydrocarbon if you burned 40 moles of oxygen gas

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.

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.

Answer trigonal pyramidal;