From the 1h nmr perspective, the human body is composed primarily of fat hydrogens (-ch2-) with a chemical shift of ~ 1 ppm, and water hydrogens (h2o) with a chemical shift of ~ 4.5 ppm. what is the resonance frequency difference between the nmr signal from these two types of hydrogens?

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.