after adding 25 mL of 0.100 M NaOh to 100 mL of .100 weak acid the pH is found to be 5.90. determine the value of Ka for acid HA

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:   bri hope this answer was ! : )

Answer/nitrogen compounds in the soil;