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Problem- In large quantities the nicotine in tobacco is a deadly poison. Calculate the molecular weight of nicotine if a solution containing 3.62 g of nicotine in 73.4 g of water (Kf = 1.85 Ã‚Â°C/m) gives a freezing point 0.563 Ã‚Â°C below the freezing point of pure water.

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