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A copper(II) sulfate solution of unknown concentration is placed in a colorimeter and an absorbance reading of 0.46 is recorded. Using the same solution cell, a 0.055 M solution of copper(II) sulfate gives an absorbance reading of 0.34. What is the molar concentration of the first solution? a) 8.60 x 10-³ mol/L b) 0.35 mol/L c) 0.041 mol/L d) 0.074 mol/L

A copper(II) sulfate solution of unknown concentration is placed in a colorimeter and an absorbance reading of 0.46 is recorded. Using the same solution cell, a 0.055 M solution of copper(II) sulfate gives an absorbance reading of 0.34. What is the molar concentration of the first solution? a) 8.60 x 10-³ mol/L b) 0.35 mol/L c) 0.041 mol/L d) 0.074 mol/L

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter18: Electrochemistry
Section: Chapter Questions
Problem 18.103QE
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A copper(II) sulfate solution of unknown concentration is placed in a colorimeter and an absorbance reading of 0.46 is recorded. Using the same solution cell, a 0.055 M solution of copper(II) sulfate gives an absorbance reading of 0.34. What is the molar concentration of the first solution? a) 8.60 x 10-³ mol/L b) 0.35 mol/L c) 0.041 mol/L d) 0.074 mol/L
Transcribed Image Text:A copper(II) sulfate solution of unknown concentration is placed in a colorimeter and an absorbance reading of 0.46 is recorded. Using the same solution cell, a 0.055 M solution of copper(II) sulfate gives an absorbance reading of 0.34. What is the molar concentration of the first solution? a) 8.60 x 10-³ mol/L b) 0.35 mol/L c) 0.041 mol/L d) 0.074 mol/L
The frequency of a transition is 3.1 x 10¹0 Hz. What is the energy of this transition? a) 2.1 x 10-44 J b) 2.0 x 10-23 J c) 2.0 x 10-23 kJ d) 2.1 x 10-44 kJ
Transcribed Image Text:The frequency of a transition is 3.1 x 10¹0 Hz. What is the energy of this transition? a) 2.1 x 10-44 J b) 2.0 x 10-23 J c) 2.0 x 10-23 kJ d) 2.1 x 10-44 kJ
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