Sir /Mam plzz answer this question again because i am getting a page showing error in the content.I will be grateful if u would help me in this matter and plzz explain me hw to solve this question:- A boat which has a speed of 5 km/h in still water crosses a river of width 1 km along the shortest possible path in 15 minutes. The velocity of the river was in km/h is

'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