Phosphatidylcholine and sphingomyelin both contain two long hydrocarbon chains, a phosphate, and the alcohol choline as a polar group. which of the following methods could you use to distinguish between these two phospholipids? □ hydrolysis with mild base separation by chromatography on silica gel acid hydrolysis followed by reaction with cupric (cu ) ion acid hydrolysis followed by reaction with sanger reagent (1-fluoro-2,4-dinitrobenzene)

i don't know, but does anyone wanna be friends? i'm doing my homework at 1: 49 in the morning : /

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.