Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Expert Solution
Step 1
1)
molality = moles of solute / Kg of solvent
moles of solute = moles of deicer
= mass of de-icer / molar mass of deicer
= 4.80 g / 111 g mol-1
= 0.0432 moles
mass of water = 58.6 g [ since water has density = 1 g / mL 58.6 mL = 58.6 g]
= 0.0586 Kg
therefore molality of de-icer = 0.0432 / 0.0586
= 0. 73 m
Thus the molality of the de-icer = 0.9 m
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