Assume that you had a mixture of solid na2co3 and nacl. could you use only h2so4 to determine whether na2co3 was present. explain.

Think about your question you literally just asked. If the person is a non-English speaker than from where they  come from it may mean something totally different to them than it does to us. It could also demonstrate a totally different way of saying the word as well.

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..