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what is an environment advantage if a polyester over a polyalkene
a polyester contains polar bonds between the carbon and oxygen so is susceptible to nucleophilic attack snd so can be easily broken down, whereas polyalkenes dont have polar bonds so cant be broken down
what is a common substance used in everyday use from a carboxylate ion?
soap
what is a common substance used in everyday use from a methyl ester?
biodiesel
what is a common substance used in everyday use from a quaternary amine?
cationic surfactant
what is the common name of a polyester?
terylene
what is the common name of a polyamide?
kevlar of nylon
why do polyamides have a higher melting point that polyesters?
contains hydrogen bonding so has stronger intermolecular forces between the molecules
how can we go from ethene to a dihaloalkane?
bromine
how does cytosine form a base pair with guanine?
Top N-H forms a hydrogen bond to the lone pair on the oxygen of guanine. The lone pair of electrons on nitrogen bonds to H-N of guanine. A lone pair of electrons on O of cytosine bonds to lower N-H of guanine.
How can cisplatin be administered so that the side effect of preventing normal healthy cells from replicating is minimised?
Use in very small amounts or target the application to the tumour
Why do different amino acids have different Rf values?
Amino acids have different polarities so they have different retention of the stationary phase
