Identify the substances that are oxidized and the substances that are reduced in

the following reactions:

(a) 4 Na + O2 ----------> 2 NaO (s)

(b) CuO (s) + H2 ---------> Cu(s) + H2O

'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