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A solution was prepared using 0.0010 g of an unknown
Chapter 9, Problem 28SP(choose chapter or problem)
A solution was prepared using \(0.0010 \mathrm{~g}\) of an unknown steroid (of molecular weight around 255) in \(100 \mathrm{~mL}\) of ethanol. Some of this solution was placed in a \(1-\mathrm{cm}\) cell, and the UV spectrum was measured. This solution was found to have \(\lambda_{\max }=235 \mathrm{~nm}, \text { with } A=0.74 \).
(a) Compute the value of the molar absorptivity at \(235 \mathrm{~nm}\).
(b) Which of the following compounds might give this spectrum?
Equation Transcription:
Text Transcription:
0.0010 g
100 mL
1-cm
\lambda_{\max }=235 \mathrm{~nm}, \text { with } A=0.74
235 nm
Questions & Answers
QUESTION:
A solution was prepared using \(0.0010 \mathrm{~g}\) of an unknown steroid (of molecular weight around 255) in \(100 \mathrm{~mL}\) of ethanol. Some of this solution was placed in a \(1-\mathrm{cm}\) cell, and the UV spectrum was measured. This solution was found to have \(\lambda_{\max }=235 \mathrm{~nm}, \text { with } A=0.74 \).
(a) Compute the value of the molar absorptivity at \(235 \mathrm{~nm}\).
(b) Which of the following compounds might give this spectrum?
Equation Transcription:
Text Transcription:
0.0010 g
100 mL
1-cm
\lambda_{\max }=235 \mathrm{~nm}, \text { with } A=0.74
235 nm
ANSWER:Solution 28SP
Step 1
