Answered: PPM | bartleby

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

Predict the structure for the unknown. Please provide relevant information regarding each peak and the rationale for how you came to identify each structure. Label any and all peaks. Show all work

Unknown 2:
Mass spec parent ion has m/z = 82.08
Elemental Analysis: 87.73% C, 12.27% H
Structure:
HDI:
PPM
2
Chemical Formula:
Fizet

Expert Solution

Step 1: Elemental analysis to determine molecular formula

$C space colon space H space equals space 87.73 space colon space 12.27 C space colon space H space equals space 87.73 space g space colon space 12.27 space g C space colon space H space equals space fraction numerator 87.73 space g over denominator 12.011 space bevelled fraction numerator g over denominator m o l end fraction end fraction space colon space fraction numerator 12.27 space g over denominator 1.008 space bevelled fraction numerator g over denominator m o l end fraction end fraction C space colon space H space equals space 7.3041 space m o l space colon space 12.1726 space m o l b o t h space d i v i d e d space b y space 1.2 comma space w e space g e t space i n t e r g e r space v a l u e C space colon space H space equals space 6 space m o l space colon space 10 space m o l$

Molecular formula = $C subscript 6 H subscript 10$

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