he absorption of energy by nuclei in NMR spectroscopy occurs in a specific part of the electromagnetic spectrum. Select the correct type of electromagnetic radiation that is used. radiofrequency radiation microwave radiation infrared radiation ultraviolet radiation

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y

answerdmitry mendeleyev made a workable classification of the elements