originalbeast6p2799m
08.10.2020 •
Chemistry
Which of the following is a reasonable ground-state electron configuration?
1s^(2)2s^(2)2p^(6)3s^(2)
1s^(2)2s^(2)2p^(6)3s^(2)3d^(4)
1s^(2)2s^(2)2d^(10)2p^(3)
1s^(2)2s^(2)2p^(3)2d^(6)
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Ответ:
2nd number is the rt one
Ответ:
The substance is a mixture
Explanation:
The question lets us know that when solvent X was used as the mobile phase, we obtained only one spot. This may deceive us into thinking that the substance is pure since a pure substance has only one spot on a chromatogram.
However, the same substance yields three spots with solvent Y. This shows that the unknown sample is a mixture of substances and solvent X was unable to fully separate the mixture.