¿Cuántos átomos de O existen en 80 g de SO3? m. a. (S=32 y O=16). Número de
Avogadro, NA= 6.1023
.

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.

Are there any options that could alot..

Answerbonded to an amino group(nh2);

Moles = mass/molar mass by this formula 458/207+32 you should get your answer the ans. is 1.916 mol to 4 sig. fig.