Dinitrogen tetrahydride reacts with dinitrogen tetraoxide to produce nitrogen gas and water (balance equation).How many moles of water would be produced if 1.22*10^3 moles of nitrogen gas were also produced?

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.

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