an aromatic hydrocarbon with empirical formula C5H4 on treatment with concentrated h2so4 gave a monosulphonic acid.0.104 g of the acid required 10 mL of N/20 naoh for complete neutralisation. the molecular formula of hydrocarbon is?

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'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