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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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3 years ago
A chemist is given a white solid that is suspected of being pure cocaine (molar mass = 303.35 g/mol). When 1.22 g of the solid is dissolved in 15.60 g of benzene, the freezing point is lowered by 1.32°C. The molar mass is calculated from these data to be 303 g. Assuming the following uncertainties, can the chemist be sure the substance is not codeine (molar mass 299.36)? Kf for benzene is 5.12°C/m.

              Uncertainties

              Mass of solid = ±0.01 g

              Mass of benzene = ±0.01 g

              ΔT (freezing point lowering) = ±0.04°C

              Kf = ±0.01

              Support your answer with calculations.

Textbook 
Chemistry: An Atoms First Approach

Chemistry: An Atoms First Approach


Edition: 3rd
Authors:
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HueyHardeyHueyHardey
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