23. What is the concentration (by mass) of the solute in a 25 °C solution prepared by dissolving2.50×10- mol Na PO, in 1.000 L of water (in ppm, ppb, and ppt, all to two decimal places)?pptA: 4.00 x 10ppm; 4.10 x 10o' ppb; 4.10×10424. A 20.0 mL aliquot of a 0.515 M aqueous solution is added to 125 mL of pure water. What is theconcentration (in M) of the new solution?A: 0.0710 NetID:Name:21. A 400.0 mL solution contains 15.0 g of ethanol (C,H,O). What is the concentration (in M) ofethanol?A: 0.81422. What volume (in mL) of a 15.0 M stock solution of aqueous sodium chloride is required to make a324.0 g 0.75 M solution?A: 820

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ne A 400.0 ml solution contains 15.0 g of ethanol (C,H¿O). What is the concentration (in M) of ethanol? A: 0.814

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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Question

23. What is the concentration (by mass) of the solute in a 25 °C solution prepared by dissolving
2.50×10- mol Na PO, in 1.000 L of water (in ppm, ppb, and ppt, all to two decimal places)?
ppt
A: 4.00 x 10
ppm; 4.10 x 10o' ppb; 4.10×104
24. A 20.0 mL aliquot of a 0.515 M aqueous solution is added to 125 mL of pure water. What is the
concentration (in M) of the new solution?
A: 0.0710

NetID:
Name:
21. A 400.0 mL solution contains 15.0 g of ethanol (C,H,O). What is the concentration (in M) of
ethanol?
A: 0.814
22. What volume (in mL) of a 15.0 M stock solution of aqueous sodium chloride is required to make a
324.0 g 0.75 M solution?
A: 820

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