x gram of pure As₂S₃ is completely oxidized to respective highest oxidation states by 50 ml of 0.1 M hot acidified KMnO₄ then x mass of As₂S₃ taken is : (Molar mass of As₂S₃ = 246)

'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