I am studying in X11 and do not know how to get along preparing for IIT JEE in the subject of chemistry esp organic and physical. I am referring O.P Tandon for org and P.Bahadur for physical. Kindly do advice

'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