sir i m very weak in organic...i am not able 2 understand it properly..i am not very good at cramming things n organic is all cramming i think...

if not...plz guide so that i m able 2 understand it n tell me from where 2 start..??

thank you

'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