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CHEM 104 Module 5 Problem Set 4 – Portage Learning Spectroscopy Exam

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This document is a problem set for Portage Learning CHEM 104 Module 5 covering various spectroscopy techniques used in organic chemistry and materials analysis. Questions include identification of spectroscopic methods: SEM/EDS for qualitative elemental analysis, mass spectroscopy for accurate molecular weight, infrared (IR) spectroscopy for functional groups, and nuclear magnetic resonance (NMR) spectroscopy for detailed information about hydrogen atoms. Students are asked to match spectra to techniques (NMR spectrum, IR spectrum, mass spectrum, SEM/EDS spectrum). Additional questions cover mass spectrometry: small peaks at masses greater than molecular weight are due to heavy isotopes (¹³C, ²H, ¹⁵N). NMR spectroscopy makes use of strong magnetic fields. Molecular weight determination from mass spectrum (most abundant peak of highest mass = 98). SEM/EDS spectrum interpretation for CaHPO₄. IR spectroscopy interpretation: CₓHᵧO with peaks at 3400, 2980, 1450, 1375, 1100 cm⁻¹ indicates alcohol; C₅H₁₀O with peak at 1720 cm⁻¹ (no 2900–2700 aldehyde doublet) indicates ketone; C₆H₁₀O with peaks at 1730, 1240, 1150 cm⁻¹ (no broad 3200–2500 acid O–H) indicates ester; C₅H₁₀ with peaks at 3100–3000, 1650, 950 cm⁻¹ indicates alkene; C₅H₁₀O₂ with broad peak 3200–2500 cm⁻¹ and 1720 cm⁻¹ indicates carboxylic acid. Suitable for college chemistry students learning spectroscopy techniques for organic compound identification.

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CHEM 104 MODULE 5 (PROBLEM SET 4)
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PORTAGE EXAM i

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Module 5: Problem Set 4
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Due No due date Points 0 Questions 18 Time Limit None




Attempt History
Attempt Time Score
LATEST Attempt 1 97 minutes 0 out of 0 *

* Some questions not yet graded




Score for this quiz: 0 out
of 0 * Submitted Jun 27 at
7:29pm This attempt took 97
minutes.


Question 1 Not yet graded / 0 pts



spectroscopy reveals the qualitative elemental
analysis of a


Your Answer:

SEM/ EDS




SEM/EDS spectroscopy reveals the qualitative elemental
analysis



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,i


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i


i Question 2 i i Not yet graded / 0 pts
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i

i i i spectroscopyi providesi ai veryi accuratei moleculari weighti ofi ai
material.i

, i


Your Answer:

Mass




Mass spectroscopy provides a very accurate molecular
weight of a


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Question 3 i i Not yet graded / 0 pts
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ii spectroscopyi revealsi whati functionali groupsi arei presenti ini


Youri Answer:i
i

Infraredi



Infrared (IR) spectroscopy reveals what functional
groups are




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Question 4 i i Not yet graded / 0 pts
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