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Explain how the different dyes in ink are separated by chromatography

As the water (the solvent) moves up the paper it carries the ink with it, but the dyes in the ink are differently soluble in the solvent AND the dyes are differently attracted to the paper, therefore the dye...
JC
Answered by Jack C. • Chemistry tutor
8252 Views

Suggest why some animals (such as snakes) can go for longer periods of time without eating, than humans?

Firstly it is important to understand that food is metabolised and that produces the energy needed for bodily fuctionsThere could be a number of reasons for animals going a longer time without eating:1 - the...
JC
Answered by Jack C. • Biology tutor
3499 Views

What is the Bohr electron configuration of Oxygen? And further O2- ?

In order to assign O's e- configuration we need to find it on the periodic table. We can see it is on the 2nd period and in group 6 (also sometimes called 16). This means it fills 2 shells and has 6 valence ...
HG
Answered by Henry G. • Chemistry tutor
12979 Views

What are your top tips for writing a personal statement?

Remember: it's about you and to help your applicationSome universities will use only your personal statement and academic records to judge whether you deserve a place and/or how you will fit in at their univ...
RA
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How to answer an exam question such as "how might action potential transmission be affected by multiple sclerosis, a nervous system disease characterised by damage to neuronal myelin sheaths"

5 marking points to hit:Transmission of action potential will be slower in neurons with damaged myelin sheaths (1) because myelin is an electrical insulator (2) so increases the speed of action potential con...
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Answered by Rebecca A. • Biology tutor
5767 Views