What is the molarity of a solution that contains 34.9 moles of AlCl3 in 13.8 liters of solution?

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.

The correct answer is weight.

Ithink the answer is c

We can't until we know what we are working with or on