covert

1.Ethane to 1,2-Dibromoethane

2.But-2-yne to Acealdehyde

3.But-2-yne to Bromobutane

4.cyclohexane to benzene

5.chloromethyl to Toluene

'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