which is the correct iupac name of the following compound:

a) propane-1,2,3-tricarbonitrile

b)3-cyano-pentan-1,5-dinitrile

plzzz answer fast......regards

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

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how to represent the possible fischer projections for 2-bromohexane