Chemistry
13th Edition
ISBN: 9781260162370
Author: Chang
Publisher: MCG
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Textbook Question
Chapter 2, Problem 2.20QP
State two differences between a metal and a nonmetal.
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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 2 Solutions
Chemistry
Ch. 2.1 - The atoms of elements A (blue) and B (orange) form...Ch. 2.3 - How many protons, neutrons, and electrons are in...Ch. 2.3 - What is the atomic number of an element if one of...Ch. 2.3 - How many neutrons are in an atom of 114Cd?Ch. 2.3 - Which of the following two symbols provides more...Ch. 2.4 - In viewing the periodic table, do chemical...Ch. 2.4 - Identify the following as a metal, metalloid, or...Ch. 2.5 - What does S8 signify? How does it differ from 8S?Ch. 2.5 - Determine the number of protons and electrons for...Ch. 2.5 - Prob. 3RCF
Ch. 2.6 - Write the empirical formula for caffeine...Ch. 2.6 - Prob. 4PECh. 2.6 - Prob. 1RCFCh. 2.6 - Prob. 2RCFCh. 2.7 - Name the following compounds: (a) PbO and (b)...Ch. 2.7 - Prob. 6PECh. 2.7 - Name the following molecular compounds: (a) NF3...Ch. 2.7 - Prob. 8PECh. 2.7 - Prob. 9PECh. 2.7 - Prob. 1RCFCh. 2.7 - Prob. 2RCFCh. 2.7 - Prob. 3RCFCh. 2.7 - Prob. 4RCFCh. 2.7 - Prob. 5RCFCh. 2.8 - Prob. 1RCFCh. 2 - Prob. 2.1QPCh. 2 - Name the types of radiation known to be emitted by...Ch. 2 - Compare the properties of the following: ...Ch. 2 - What is meant by the term fundamental particle?Ch. 2 - Describe the contributions of the following...Ch. 2 - Describe the experimental basis for believing that...Ch. 2 - The diameter of a helium atom is about 1 102 pm....Ch. 2 - Prob. 2.8QPCh. 2 - Use the helium-4 isotope to define atomic number...Ch. 2 - Why do all atoms of an element have the same...Ch. 2 - What do we call atoms of the same elements with...Ch. 2 - Explain the meaning of each term in the symbol...Ch. 2 - What is the mass number of an iron atom that has...Ch. 2 - Calculate the number of neutrons in 239Pu.Ch. 2 - Prob. 2.15QPCh. 2 - Indicate the number of protons, neutrons, and...Ch. 2 - Write the appropriate symbol for each of the...Ch. 2 - Write the appropriate symbol for each of the...Ch. 2 - What is the periodic table, and what is its...Ch. 2 - State two differences between a metal and a...Ch. 2 - Write the names and symbols for four elements in...Ch. 2 - Define, with two examples, the following terms:...Ch. 2 - Prob. 2.23QPCh. 2 - Describe the changes in properties (from metals to...Ch. 2 - Consult a handbook of chemical and physical data...Ch. 2 - Group the following elements in pairs that you...Ch. 2 - Prob. 2.27QPCh. 2 - Prob. 2.28QPCh. 2 - Describe the two commonly used molecular models.Ch. 2 - Prob. 2.30QPCh. 2 - Prob. 2.31QPCh. 2 - Prob. 2.32QPCh. 2 - Identify the following as elements or compounds:...Ch. 2 - Prob. 2.34QPCh. 2 - Give the number of protons and electrons in each...Ch. 2 - Give the number of protons and electrons in each...Ch. 2 - Pair the following species that contain the same...Ch. 2 - Write the correct symbols for the atoms that...Ch. 2 - What does a chemical formula represent? What is...Ch. 2 - Define molecular formula and empirical formula....Ch. 2 - Give an example of a case in which two molecules...Ch. 2 - Prob. 2.42QPCh. 2 - Prob. 2.43QPCh. 2 - Prob. 2.44QPCh. 2 - Prob. 2.45QPCh. 2 - Prob. 2.46QPCh. 2 - What are the empirical formulas of the following...Ch. 2 - What are the empirical formulas of the following...Ch. 2 - Write the molecular formula of glycine, an amino...Ch. 2 - Write the molecular formula of ethanol. The color...Ch. 2 - Prob. 2.51QPCh. 2 - Prob. 2.52QPCh. 2 - Prob. 2.53QPCh. 2 - Prob. 2.54QPCh. 2 - Prob. 2.55QPCh. 2 - Prob. 2.56QPCh. 2 - Prob. 2.57QPCh. 2 - Prob. 2.58QPCh. 2 - Name these compounds: (a) Na2CrO4, (b) K2HPO4, (c)...Ch. 2 - Prob. 2.60QPCh. 2 - Prob. 2.61QPCh. 2 - Prob. 2.62QPCh. 2 - Sulfur (S) and fluorine (F) form several different...Ch. 2 - Prob. 2.64QPCh. 2 - Prob. 2.65QPCh. 2 - In which one of the following pairs do the two...Ch. 2 - Prob. 2.67QPCh. 2 - Prob. 2.68QPCh. 2 - Determine the molecular and empirical formulas of...Ch. 2 - What is wrong with or ambiguous about the phrase...Ch. 2 - Prob. 2.71QPCh. 2 - Which of the following are elements, which are...Ch. 2 - Prob. 2.73QPCh. 2 - Prob. 2.74QPCh. 2 - Each of the following pairs of elements will react...Ch. 2 - Match the descriptions [(a)(h)] with each of the...Ch. 2 - Explain why anions are always larger than the...Ch. 2 - Prob. 2.78QPCh. 2 - Caffeine, shown here, is a psychoactive stimulant...Ch. 2 - Prob. 2.80QPCh. 2 - Prob. 2.81QPCh. 2 - Prob. 2.82QPCh. 2 - Fill in the blanks in the following table.Ch. 2 - Prob. 2.84QPCh. 2 - Write the formula of the common ion derived from...Ch. 2 - Prob. 2.86QPCh. 2 - Prob. 2.87QPCh. 2 - Of the 118 elements known, only two are liquids at...Ch. 2 - Prob. 2.89QPCh. 2 - Prob. 2.90QPCh. 2 - Prob. 2.91QPCh. 2 - Prob. 2.92QPCh. 2 - Prob. 2.93QPCh. 2 - Prob. 2.94QPCh. 2 - List five elements each that are (a) named after...Ch. 2 - Prob. 2.96QPCh. 2 - Fluorine reacts with hydrogen (H) and deuterium...Ch. 2 - Prob. 2.98QPCh. 2 - Identify each of the following elements: (a) a...Ch. 2 - Prob. 2.100QPCh. 2 - Show the locations of (a) alkali metals, (b)...Ch. 2 - Fill the blanks in the following table.Ch. 2 - Prob. 2.103QPCh. 2 - In Section 2.1 it was pointed out that mass and...Ch. 2 - Draw all possible structural formulas of the...Ch. 2 - Prob. 2.106QPCh. 2 - Draw two different structural formulas based on...Ch. 2 - Prob. 2.108QPCh. 2 - Prob. 2.109QPCh. 2 - A monatomic ion has a charge of +2. The nucleus of...Ch. 2 - In the following 2 2 crossword, each letter must...Ch. 2 - Prob. 2.112QPCh. 2 - Prob. 2.113QPCh. 2 - Prob. 2.114QPCh. 2 - Prob. 2.115QPCh. 2 - Prob. 2.116QPCh. 2 - Prob. 2.117QPCh. 2 - Prob. 2.118QPCh. 2 - Prob. 2.119QPCh. 2 - Prob. 2.120QPCh. 2 - Prob. 2.121QPCh. 2 - One technique proposed for recycling plastic...
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