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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Step 1
Given : mass of NaCl = 8.77 g
Volume of NaCl solution = 20 mL = 0.020 L (since 1 L = 1000 mL)
Since molar mass of NaCl = Atomic mass of Na + Atomic mass of Cl = 23 + 35.5 = 58.5 g/mol
And since mass = moles X molar mass
=> 8.77 = moles of NaCl X 58.5
=> moles of NaCl = 0.150 mol approx
Since moles of NaCl = concentration of NaCl X volume of NaCl solution in L
=> 0.150 = concentration of NaCl X 0.020
=> concentration of NaCl = 7.50 M approx
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