
Chemistry For Today: General, Organic, And Biochemistry, Loose-leaf Version
9th Edition
ISBN: 9781305968707
Author: Spencer L. Seager
Publisher: Brooks Cole
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Chapter 21, Problem 21.3E
Interpretation Introduction
Interpretation:
The names of the three components of nucleotides are to be stated.
Concept introduction:
The term DNA stands for deoxyribonucleic acid. Deoxyribonucleic acid is the most important
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Identifying the major species in weak acid or weak base equilibria
The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at
equilibrium. You can leave out water itself.
Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the
formulas of the species that will act as neither acids nor bases in the 'other' row.
You will find it useful to keep in mind that NH3 is a weak base.
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bases: ☐
solution.
other: ☐
0.18 mol of HNO3 is added
to 1.0 L of a solution that is
1.4M in both NH3 and
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acids:
bases: ☐
other: ☐
0,0,...
?
000
18
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1
Using reaction free energy to predict equilibrium composition
Consider the following equilibrium:
2NH3 (g) = N2 (g) +3H₂
—N2 (g) AGº = 34. kJ
Now suppose a reaction vessel is filled with 4.19 atm of ammonia (NH3) and 9.94 atm of nitrogen (N2) at 378. °C. Answer the following questions about this
system:
rise
Under these conditions, will the pressure of NH 3 tend to rise or fall?
☐ x10
fall
Х
Is it possible to reverse this tendency by adding H₂?
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be changed to a tendency to fall by adding H₂? Similarly, if you said the
pressure of NH3 will tend to fall, can that be changed to a tendency to
rise by adding H₂?
If you said the tendency can be reversed in the second question, calculate
the minimum pressure of H₂ needed to reverse it.
Round your answer to 2 significant digits.
yes
no
atm
00.
18
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Identifying the major species in weak acid or weak base equilibria
The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at
equilibrium. You can leave out water itself.
Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the
formulas of the species that will act as neither acids nor bases in the 'other' row.
You will find it useful to keep in mind that HF is a weak acid.
2.2 mol of NaOH is added to
1.0 L of a 1.4M HF
solution.
acids:
П
bases:
Х
other: ☐
ப
acids:
0.51 mol of KOH is added to
1.0 L of a solution that is
bases:
1.3M in both HF and NaF.
other: ☐
00.
18
Ar
Chapter 21 Solutions
Chemistry For Today: General, Organic, And Biochemistry, Loose-leaf Version
Ch. 21 - What is the principal location of DNA within the...Ch. 21 - Which pentose sugar is present in DNA? In RNA?Ch. 21 - Prob. 21.3ECh. 21 - Prob. 21.4ECh. 21 - Prob. 21.5ECh. 21 - Prob. 21.6ECh. 21 - Prob. 21.7ECh. 21 - Identify the 3 and 5 ends of the DNA segment...Ch. 21 - Prob. 21.9ECh. 21 - Prob. 21.10E
Ch. 21 - Describe the role of hydrogen bonding in the...Ch. 21 - How many total hydrogen bonds would exist between...Ch. 21 - How many total hydrogen bonds would exist between...Ch. 21 - Prob. 21.14ECh. 21 - A strand of DNA has the base sequence GATTCA....Ch. 21 - What is a chromosome? How many chromosomes are in...Ch. 21 - Prob. 21.17ECh. 21 - What is a replication fork?Ch. 21 - Prob. 21.19ECh. 21 - List the steps involved in DNA replication.Ch. 21 - What enzymes are involved in DNA replication?Ch. 21 - In what direction is a new DNA strand formed?Ch. 21 - Prob. 21.23ECh. 21 - Prob. 21.24ECh. 21 - Prob. 21.25ECh. 21 - How does the sugar-phosphate backbone of RNA...Ch. 21 - Compare the secondary structures of RNA and DNA.Ch. 21 - Briefly describe the characteristics and functions...Ch. 21 - Must the ratio of guanine to cytosine be 1:1 in...Ch. 21 - What are the two important regions of a tRNA...Ch. 21 - Prob. 21.31ECh. 21 - In the flow of genetic information, what is meant...Ch. 21 - Prob. 21.33ECh. 21 - Write the base sequence for the mRNA that would be...Ch. 21 - Prob. 21.35ECh. 21 - What is the relationship among exons, introns, and...Ch. 21 - What is a codon?Ch. 21 - For each of the following mRNA codons, give the...Ch. 21 - Describe the experiment that allowed researchers...Ch. 21 - Which of the following statements about the...Ch. 21 - The -chain of hemoglobin is a protein that...Ch. 21 - Prob. 21.42ECh. 21 - Prob. 21.43ECh. 21 - Prob. 21.44ECh. 21 - Prob. 21.45ECh. 21 - Prob. 21.46ECh. 21 - Prob. 21.47ECh. 21 - Prob. 21.48ECh. 21 - Prob. 21.49ECh. 21 - Prob. 21.50ECh. 21 - Prob. 21.51ECh. 21 - Prob. 21.52ECh. 21 - Prob. 21.53ECh. 21 - Prob. 21.54ECh. 21 - Prob. 21.55ECh. 21 - Prob. 21.56ECh. 21 - Prob. 21.57ECh. 21 - Prob. 21.58ECh. 21 - Prob. 21.59ECh. 21 - Genetic engineering shows great promise for the...Ch. 21 - Prob. 21.61ECh. 21 - Prob. 21.62ECh. 21 - Prob. 21.63ECh. 21 - Prob. 21.64ECh. 21 - Prob. 21.65ECh. 21 - Prob. 21.66ECh. 21 - How does the DNA content determine what reactions...Ch. 21 - What would be the ramifications if DNA were single...Ch. 21 - Prob. 21.69ECh. 21 - Prob. 21.70ECh. 21 - Explain the function and importance of each of the...Ch. 21 - Prob. 21.72ECh. 21 - Which base is found in DNA but not in RNA? a....Ch. 21 - Which of the following best describes tRNA? a. It...Ch. 21 - Which of the following is the site of protein...Ch. 21 - In messenger RNA, a codon contains how many...
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Nucleic acids - DNA and RNA structure; Author: MEDSimplified;https://www.youtube.com/watch?v=0lZRAShqft0;License: Standard YouTube License, CC-BY