Chemistry In Focus
7th Edition
ISBN: 9781337399692
Author: Tro, Nivaldo J.
Publisher: Cengage Learning,
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Chapter 1, Problem 1.3YT
The Conservation of Mass
A match is weighed and then burned. The ashes are found to weigh much less. How can this be consistent with the conservation of mass?
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6.
Choose the compound that will produce the spectrum below and assign the signals as carbonyl, aryl, or alkyl.
100
ō (ppm)
50
0
7.
200
150
Assign all of the protons on the spectrum below.
8.
A
B
4
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C
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1
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Choose the compound that will produce the spectrum below and assign the signals to the corresponding
protons.
OH
6
OH
3
2
1
0
4
ō (ppm)
In the Thermo Fisher application note about wine analysis (Lesson 3), the following
chromatogram was collected of nine components of wine. If peak 3 has a retention time of
3.15 minutes and a peak width of 0.070 minutes, and peak 4 has a retention time of 3.24
minutes and a peak width of 0.075 minutes, what is the resolution factor between the two
peaks? [Hint: it will help to review Lesson 2 for this question.]
MAU
300
200
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34
5
100-
1 2
CO
6
7
8
9
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2.4
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2.8
3.0 3.2 3.4
3.6
3.8 4.0 4.2
4.4
4.6
4.8
5.0
5.2
Minutes
3.22
0.62
1.04
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The diagram shows two
metals, A and B, which melt at
1000°C and 1400°C. State the
weight percentage of the
primary constituent (grains of
C) that would be obtained by
solidifying a 20% alloy of B.
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1200 C
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800°C
700°C
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96
92
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0
10
20
30
40
50
60
70 80 90 100
A
% peso B
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Chapter 1 Solutions
Chemistry In Focus
Ch. 1 - A chemist observes the behavior of a gas by...Ch. 1 - Classifying Matter Determine whether each of the...Ch. 1 - A cup of coffee is an example of: a. a liquid pure...Ch. 1 - Water is put on the stove and heated with a...Ch. 1 - The Conservation of Mass A match is weighed and...Ch. 1 - Constant Composition of Compounds Two samples of...Ch. 1 - Prob. 4SCCh. 1 - What is meant by the statement Macroscopic...Ch. 1 - Why should nonscience majors study science?Ch. 1 - Prob. 3E
Ch. 1 - Define chemistry.Ch. 1 - Prob. 5ECh. 1 - Prob. 6ECh. 1 - How are science and art similar? How are they...Ch. 1 - What is different about the Greek philosophers...Ch. 1 - Match each of the people in column A with their...Ch. 1 - What were the two main pursuits of alchemy? What...Ch. 1 - Prob. 11ECh. 1 - What is the difference between an element and a...Ch. 1 - What is the difference between a pure substance...Ch. 1 - What is the difference between a homogeneous...Ch. 1 - Explain the differences among a solid, a liquid,...Ch. 1 - Match each term in the left column with three...Ch. 1 - What is the atomic theory?Ch. 1 - Describe Rutherfords gold foil experiment.Ch. 1 - Describe the structure of the atom as explained by...Ch. 1 - What are black holes, and how does their existence...Ch. 1 - Classify each of the following as an observation...Ch. 1 - Classify each of the following as a law or a...Ch. 1 - To the best of your knowledge, classify each of...Ch. 1 - To the best of your knowledge, classify each of...Ch. 1 - Which substance is a liquid mixture? a. lemonade...Ch. 1 - Which substance is a solid? a. the helium in a...Ch. 1 - Classify each of the following properties as...Ch. 1 - Classify each of the following properties as...Ch. 1 - Classify each of the following changes as physical...Ch. 1 - Classify each of the following changes as physical...Ch. 1 - The burning of gasoline in automobile engines is a...Ch. 1 - A campfire is a chemical reaction involving wood...Ch. 1 - Prob. 33ECh. 1 - Prob. 34ECh. 1 - A chemist combines 22 grams of sodium with 28...Ch. 1 - A chemist combines 6 grams of hydrogen with 52...Ch. 1 - Several samples of carbon dioxide are obtained and...Ch. 1 - Several samples of methane gas, the primary...Ch. 1 - According to Rutherfords model of the atom, how...Ch. 1 - According to Rutherfords model of the atom, how...Ch. 1 - When water boils, small bubbles form in the...Ch. 1 - Prob. 42ECh. 1 - Prob. 43ECh. 1 - Prob. 44ECh. 1 - Prob. 45ECh. 1 - The nuclei of a limited number of atoms are...Ch. 1 - Prob. 47ECh. 1 - Based on the molecular views shown for each of the...Ch. 1 - Read The Molecular Revolution" box in this chapter...
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- 8. Choose the compound that will produce the spectrum below and assign the signals to the corresponding protons. 2 4 3 ō (ppm) OH 4 6 6 СОН 2 1 0arrow_forward7. Assign all of the protons on the spectrum below. A B 2 C E 2 1 3 6 4 3 2 1 0arrow_forwarde. If (3R,4R)-3,4-dichloro-2,5-dimethylhexane and (3R,4S)-3,4-dichloro-2,5-dimethylhexane are in a solution at the same concentration, would this solution be expected to rotate plane polarized light (that is, be optically active)? Please provide your reasoning for your answer. [If you read this problem carefully, you will not need to draw out the structures to arrive at your answer...]arrow_forward
- 1. How many neighbors does the proton that produces the multiplet below have? 2. 3. اللـ Draw a partial structure from the multiplet below. (The integration of the multiplet is 6) M Using the additivity constants found in appendix G of your lab manual, calculate the approximate chemical shifts of the protons indicated below. (Show your work!!!) B A Br SHarrow_forward1) Suppose 0.1 kg ice at 0°C (273K) is in 0.5kg water at 20°C (293K). What is the change in entropy of the ice as it melts at 0°? To produce the original "water gas" mixture, carbon (in a combustible form known as coke) is reacted with steam: 131.4 kJ + H20(g) + C(s) → CO(g) + H2(g) From this information and the equations in the previous problem, calculate the enthalpy for the combustion or carbon to form carbon dioxide. kindly show me how to solve this long problem. Thanksarrow_forward4. An 'H-NMR of a compound is acquired. The integration for signal A is 5692 and the integration for signal B is 25614. What is the simplest whole number ratio of protons for signals A and B? (Show your work!!!) 5. Assign the carbons in the NMR below as either carbonyl, aromatic, or alkyl. 200 150 100 50 ō (ppm) 1arrow_forward
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