1) You are attempting to separate value from serine on a C18 column with a methanol:acetic acid mobile phase. You get the following profile:a) Label the two peaks (valine and serine) (2 points)b) Is this reverse phase or normal phase chromatography

the answer is 0.8m.

by: nicholas

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.