can Me2S be used in place of Zn dust while undergoing the ozonolysis of a unsaturated compound?

can CH2Cl2 or CHCl3 or CH3Cl be used in liue of Zn dust?

'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