A certain substance X has a normal freezing point of −8.9°C and a molal freezing point depression constant =Kf·2.52°C·kgmol−1. A solution is prepared by dissolving some urea NH22CO in 100.g of X. This solution freezes at −12.3°C. Calculate the mass of urea that was dissolved. Round your answer to 2 significant digits.
A certain substance X has a normal freezing point of −8.9°C and a molal freezing point depression constant =Kf·2.52°C·kgmol−1. A solution is prepared by dissolving some urea NH22CO in 100.g of X. This solution freezes at −12.3°C. Calculate the mass of urea that was dissolved. Round your answer to 2 significant digits.
Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter14: Mixtures And Solutions
Section: Chapter Questions
Problem 17STP
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A certain substance X has a normal freezing point of −8.9°C and a molal freezing point depression constant =Kf·2.52°C·kgmol−1. A solution is prepared by dissolving some urea NH22CO in 100.g of X. This solution freezes at −12.3°C. Calculate the mass of urea that was dissolved. Round your answer to 2 significant digits.
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