I have 4 months left for my Mains Exam.I have always had a problem with organic chemistry.I have 1 month to study for my Mains.So for someone like me what would you suggest to get better at organic chemistry?Just basic important lessons to get a better understanding of all the organic chemistry sub chapters.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