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caffeine the freezing point of a solution prepared by dissolving 150 x 10^-3 g of caffeine...

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Chemistry

caffeine the freezing point of a solution prepared by dissolving150 x 10^-3 g of caffeine in 10.0 g of camphor is lower by 3.07Cthan that of pure camphor (Kf = 39.7 C/m) what is the molar mass ofcaffeine? Elemental analysis of caffeine yields the followingresults: 49.49% C, 5.15% H, and the remainder is 0. What is thmolecular formula of caffeine? Please explain the steps taken toget both answers. Thank you

Answer & Explanation Solved by verified expert
4.4 Ratings (792 Votes)
Answer Given mass of caffeine 0150 g mass of camphor 100 g Tf 307oC Kf 397oCm We know Tf Kf m So m Tf Kf 307oC 397oCm1 00773 m We know molality moles of solute kg    See Answer
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