For Charles Gas Law how do i identify the Volumes like 3.) If I have 45L of helium in a balloon at 300K and increase the temperature of the
balloon to 350K, what will the new volume of the balloon be?
V1:
T1:
V2:
T2:

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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.