Chemistry (OER)
2nd Edition
ISBN: 9781947172616
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 1, Problem 28E
Classify each of the following changes as physical or chemical:
- coal burning
- ice melting
- mixing chocolate syrup with milk
- explosion of a firecracker
- magnetizing of a screwdriver
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Part VII. The H-NMR of a compound with molecular formula C5 H 10 O2 is given below.
Find the following:
(a) The no. of protons corresponding to each signal in the spectra
(6) Give the structure of the compound and assign the signals to each
proton in the compound.
a
70.2
Integration Values
C5H10O2
b
47.7
C
46.5
d
69.5
3.6 3.5
3.4 3.3 3.2 3.1 3.0
2.9 2.8
2.7
2.6 2.5
2.4 2.3 2.2 2.1 2.0
Chemical Shift (ppm)
1.9
1.8
1.7 1.6
1.5
1.4 1.3 1.2
1.1 1.0
0.9 0.8
Part 111. 1 H-NMR spectrum of a compound with integration values in red is given below.
Answer the following:
(a) write the signals in the 'H-NMR spectrum to the corresponding protons on the structure
of the molecule below.
(b) Identify the theoretical multiplicities for each proton in the compound. Also give the possible.
complex splitting patterns assuming J values are not similar.
там
Br
22
2
3
6
4 7.2 7.0 6.8 6.6 6.4 6.2 6.0 5.8 5.6 5.4 5.2 5.0 4.8 4.6 4.4 4.2 4.0 3.8 3.6 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0
Chemical Shift (ppm)
ra.
Br
2
3
6
6
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
Chemical Shift (ppm)
2
2
Br
7.3
7.2
7.1
7.0 6.9
6.7 6.6 6.5
6.4
6.3
6.2
6.1
6.0
Chemical Shift (ppm)
5.9
5.8 5.7
5.5 5.4 5.3 5.2
5.0 4.9
1600°
1538°C
1493°C
In the diagram, the letter L indicates
that it is a liquid. Indicate its
components in the upper region
where only L is indicated.
The
iron-iron carbide phase
diagram.
Temperature (°C)
1400
8
1394°C
y+L
1200
2.14
y, Austenite
10000
912°C
800a
0.76
0.022
600
400
(Fe)
a, Ferrite
Composition (at% C)
15
1147°C
a + Fe3C
2
3
Composition (wt% C)
L
2500
4.30
2000
y + Fe3C
727°C
1500
Cementite (Fe3C)
1000
4
5
6
6.70
Temperature (°F)
Chapter 1 Solutions
Chemistry (OER)
Ch. 1 - Explain how you could experimentally determine...Ch. 1 - Identify each of the following statements as being...Ch. 1 - Identify each of the following statements as being...Ch. 1 - Identify each of the underlined items as a part of...Ch. 1 - Identify each of the underlined items as a part of...Ch. 1 - According to one theory, the pressure of a gas...Ch. 1 - The amount of heat required to melt 2 lbs of ice...Ch. 1 - Why do we use an objects mass, rather than its...Ch. 1 - What properties distinguish solids from liquids?...Ch. 1 - How does a heterogeneous mixture differ from a...
Ch. 1 - How does a homogeneous mixture differ from a pure...Ch. 1 - How does an element differ from a compound? How...Ch. 1 - How do molecules of elements and molecules of...Ch. 1 - How does an atom differ from a molecule? In what...Ch. 1 - Many of the items you purchase are mixtures of...Ch. 1 - Classify each of the following as an element, a...Ch. 1 - Classify each of the following as an element, a...Ch. 1 - A sulfur atom and a sulfur molecule are not...Ch. 1 - How are the molecules in oxygen gas, the molecules...Ch. 1 - We refer to astronauts in space as weightless, but...Ch. 1 - As we drive an automobile, we don’t think about...Ch. 1 - Matter is everywhere around us. Make a list by...Ch. 1 - When elemental iron corrodes it combines with...Ch. 1 - As stated in the text, convincing examples that...Ch. 1 - Yeast converts glucose to ethanol and carbon...Ch. 1 - Classify the six underlined properties in the...Ch. 1 - Classify each of the following changes as physical...Ch. 1 - Classify each of the following changes as physical...Ch. 1 - The volume of a sample of oxygen gas changed from...Ch. 1 - A 2.0-mer volume of hydrogen gas combined with 1.0...Ch. 1 - Explain the difference between extensive...Ch. 1 - Identify the following properties as either...Ch. 1 - The density (d) of a substance is an intensive...Ch. 1 - Is one liter about an ounce, a pint, a quart, or a...Ch. 1 - Is a meter about an inch, a foot, a yard, or a...Ch. 1 - Indicate the SI base units or derived units that...Ch. 1 - Indicate the SI base units or derived units that...Ch. 1 - Give the name and symbol of the prefixes used with...Ch. 1 - Give the name of the prefix and the quantity...Ch. 1 - A large piece of jewelry has a mass of 132.6 g. A...Ch. 1 - Visit this PhET density simulation...Ch. 1 - Visit this PhET density simulation...Ch. 1 - Visit this PhET density simulation...Ch. 1 - Express each of the following numbers in...Ch. 1 - Express each of the following numbers in...Ch. 1 - Indicate whether each of the following can be...Ch. 1 - Indicate whether each of the following can be...Ch. 1 - How many significant figures are contained in each...Ch. 1 - How many significant figures are contained in each...Ch. 1 - The following quantities were reported on the...Ch. 1 - Round off each of the following numbers to two...Ch. 1 - Round off each of the following numbers to two...Ch. 1 - Perform the following calculations and report each...Ch. 1 - Perform the following calculations and report each...Ch. 1 - Consider the results of the archery contest shown...Ch. 1 - Classify the following sets of measurements as...Ch. 1 - Write conversion factors (as ratios) for the...Ch. 1 - Write conversion factors (as ratios) for the...Ch. 1 - The label on a soft drink boule gives the volume...Ch. 1 - The label on a box of cereal gives the mass of...Ch. 1 - Soccer is played with a round ball having a...Ch. 1 - A woman’s basketball has a circumference between...Ch. 1 - How many milliliters of a soft drink are contained...Ch. 1 - A barrel of oil is exactly 42 gal. How many liters...Ch. 1 - The diameter of a red blood cell is about 3104 in....Ch. 1 - The distance between the centers of the two oxygen...Ch. 1 - Is a 197-lb weight lifter light enough to compete...Ch. 1 - A very good 197-Ib weight lifter lifted 192 kg in...Ch. 1 - Many medical laboratory tests are run using 5.0 L...Ch. 1 - If an aspirin tablet Contains 325 mg aspirin, how...Ch. 1 - Use scientific (exponential) notation to express...Ch. 1 - Complete the following conversions between SI...Ch. 1 - Gasoline is sold by the liter in many countries....Ch. 1 - Milk is sold by the liter in many Countries. What...Ch. 1 - A long ton is defined as exactly 2240 lb. What is...Ch. 1 - Make the conversion indicated in each of the...Ch. 1 - Make the conversion indicated in each of the...Ch. 1 - Many chemistry conferences have held a 50-Trillion...Ch. 1 - Many chemistry conferences have held a 50-Trillion...Ch. 1 - The gas tank of a certain luxury automobile holds...Ch. 1 - As an instructor is preparing for an experiment,...Ch. 1 - To prepare for a laboratory period, a student lab...Ch. 1 - A chemistry student is 159 cm tall and weighs 45.8...Ch. 1 - In a recent Grand Prix, the winner completed the...Ch. 1 - Solve these problems about lumber dimensions. To...Ch. 1 - The mercury content of a stream was believed to be...Ch. 1 - Calculate the density of aluminum if 27.6 cm3 has...Ch. 1 - Osmium is one of the densest elements known. What...Ch. 1 - Calculate these masses. What is the mass of 6.00...Ch. 1 - Calculate these masses. What is the mass of 4.00...Ch. 1 - Calculate these volumes. What is the volume of 25...Ch. 1 - Calculate these volumes. What is the volume of...Ch. 1 - Convert the boiling temperature of gold, 2966 C,...Ch. 1 - Convert the temperature of scalding water, 54 C,...Ch. 1 - Convert the temperature of the coldest area in a...Ch. 1 - Convert the temperature of dry ice, 77 C, into...Ch. 1 - Convert the boiling temperature of liquid ammonia....Ch. 1 - The label on a pressurized can of spray...Ch. 1 - The weather in Europe was unusually warm during...
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