**Mass Spectrum Analysis of Alkane**To determine the molecular formula of the alkane represented in the mass spectrum, examine the graph which plots the *relative abundance* (y-axis) against the *mass-to-charge ratio (m/z)* (x-axis). **Graph Details:**1. **Peaks:** - **m/z 29** - Relative abundance: Approximately 28 - **m/z 43** - Relative abundance: Approximately 100 (base peak) - **m/z 57** - Relative abundance: Approximately 61 - **m/z 71** - Relative abundance: Approximately 16 - **m/z 85** - Relative abundance: Approximately 29 - **m/z 100** - Relative abundance: Low detection, around 22. **Axes:** - The x-axis ranges from 10 to 110 m/z. - The y-axis ranges from 0 to 100, indicating relative abundance percentages.**Problem Statement:**- Calculate the molecular formula of the alkane using the observed mass spectrum.**Formula Displayed:**- Molecular formula: $ \text{C}_n\text{H}_x $Below this is a text box for input, labeled with the instruction: *Replace the subscript variables with numbers.* Considering the highest significant peak at m/z 100, this mass can be attributed to the highest potential molecular ion of the alkane.

The atomic mass of carbon = 12 amu The atomic mass of hydrogen = 1 amu

Find the molecular formula of the alkane represented in the mass spectrum. Relative Abundance 100 90 80 70 60 50 40 30 20 10 0 10 20 29 30 molecular formula: 40 43 50 C₂Hx 57 60 m/z 71 Th 70 80 85 90 100 100 110 Replace the su

Find the molecular formula of the alkane represented in the mass spectrum. Relative Abundance 100 90 80 70 60 50 40 30 20 10 0 10 20 29 30 molecular formula: 40 43 50 C₂Hx 57 60 m/z 71 Th 70 80 85 90 100 100 110 Replace the su

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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Concept explainers

NMR Spectroscopy

NMR stands for Nuclear Magnetic Resonance in which the study of different molecules is done based on the interaction of radiofrequency electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field. A precise study of spectra of visible light and all bands of electromagnetic radiation is called spectroscopy.

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**Mass Spectrum Analysis of Alkane**

To determine the molecular formula of the alkane represented in the mass spectrum, examine the graph which plots the *relative abundance* (y-axis) against the *mass-to-charge ratio (m/z)* (x-axis).

**Graph Details:**

1. **Peaks:**
- **m/z 29**
- Relative abundance: Approximately 28
- **m/z 43**
- Relative abundance: Approximately 100 (base peak)
- **m/z 57**
- Relative abundance: Approximately 61
- **m/z 71**
- Relative abundance: Approximately 16
- **m/z 85**
- Relative abundance: Approximately 29
- **m/z 100**
- Relative abundance: Low detection, around 2

2. **Axes:**
- The x-axis ranges from 10 to 110 m/z.
- The y-axis ranges from 0 to 100, indicating relative abundance percentages.

**Problem Statement:**

- Calculate the molecular formula of the alkane using the observed mass spectrum.

**Formula Displayed:**

- Molecular formula: $ \text{C}_n\text{H}_x $

Below this is a text box for input, labeled with the instruction: *Replace the subscript variables with numbers.*

Considering the highest significant peak at m/z 100, this mass can be attributed to the highest potential molecular ion of the alkane.

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