Chemistry in Context
Chemistry in Context
8th Edition
ISBN: 9780073522975
Author: American Chemical Society
Publisher: McGraw-Hill Education
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Chapter 1, Problem 35Q

(a)

Interpretation Introduction

Interpretation:

The given amount in percentage has to be expressed in ppm.

Concept Introduction:

1%=1/1001ppm=1/10000001ppm=0.0001%

1 ppm=1000ppb

(b)

Interpretation Introduction

Interpretation:

The National Ambient Air Quality Standards for CO has to be compared for 1-hour and 8-hour.

Concept Introduction:

1%=1/1001ppm=1/10000001ppm=0.0001%

1 ppm=1000ppb

(c)

Interpretation Introduction

Interpretation:

Reason why smokers do not die from CO poisoning has to be proposed.

Concept Introduction:

Atmosphere is get polluted by various human activities. The major air pollutants are ozone, nitrogen dioxide, sulphur dioxide, volatile organic compounds(VOCs) and carbon monoxide.

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(a 4 shows scanning electron microscope (SEM) images of extruded actions of packing bed for two capillary columns of different diameters, al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the same stationary phase, spherical particles with 1-um diameter. A) When the columns were prepared, the figure shows that the column with the larger diameter has more packing irregularities. Explain this observation. B) Predict what affect this should have on band broadening and discuss your prediction using the van Deemter terms. C) Does this figure support your explanations in application question 33? Explain why or why not and make any changes in your answers in light of this figure. Figure 4 SEM images of sections of packed columns for a) 750 and b) 30-um-i.d. capillary columns.³
fcrip = ↓ bandwidth Il temp 32. What impact (increase, decrease, or no change) does each of the following conditions have on the individual components of the van Deemter equation and consequently, band broadening? Increase temperature Longer column Using a gas mobile phase instead of liquid Smaller particle stationary phase Multiple Paths Diffusion Mass Transfer
34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.). A) Predict whether decreasing the column inner diameters increase or decrease bandwidth. B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or decreasing bandwidth as a function of i.d. and justify your answer. Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles. 35 20 H(um) 큰 20 15 90 0+ 1500 100 75 550 01 02 594 05 μ(cm/sec) 30 15 10

Chapter 1 Solutions

Chemistry in Context

Ch. 1.12 - Summarize what you have learned about ozone...Ch. 1.13 - Prob. 1.27YTCh. 1.13 - Prob. 1.28YTCh. 1.13 - Prob. 1.29SCCh. 1.13 - Prob. 1.30YTCh. 1.13 - Prob. 1.35CTCh. 1 - Prob. 1QCh. 1 - Prob. 2QCh. 1 - Prob. 3QCh. 1 - Identify three sources of particulate matter found...Ch. 1 - Prob. 5QCh. 1 - Prob. 6QCh. 1 - In these diagrams, two different types of atoms...Ch. 1 - Prob. 8QCh. 1 - Prob. 9QCh. 1 - Prob. 10QCh. 1 - Prob. 11QCh. 1 - Prob. 12QCh. 1 - Prob. 13QCh. 1 - Consider the following blank periodic table. a....Ch. 1 - Classify each of these substances as an element, a...Ch. 1 - Prob. 16QCh. 1 - Hydrocarbons are important fuels that we burn...Ch. 1 - Prob. 18QCh. 1 - Arrange these types of radiation in order of...Ch. 1 - These questions relate to the combustion of...Ch. 1 - Balance these equations in which ethane (C2 H4)...Ch. 1 - Prob. 22QCh. 1 - Count the atoms on both sides of the equation to...Ch. 1 - Prob. 24QCh. 1 - Nail polish remover containing acetone was spilled...Ch. 1 - Prob. 26QCh. 1 - Prob. 27QCh. 1 - Prob. 28QCh. 1 - Prob. 29QCh. 1 - Prob. 30QCh. 1 - A headline from the Anchorage Daily News in Alaska...Ch. 1 - Prob. 32QCh. 1 - Consider how life on Earth would change if the...Ch. 1 - Prob. 34QCh. 1 - Prob. 35QCh. 1 - Prob. 36QCh. 1 - Prob. 37QCh. 1 - Prob. 38QCh. 1 - Prob. 39QCh. 1 - Prob. 40QCh. 1 - Prob. 41QCh. 1 - Prob. 42QCh. 1 - Prob. 43QCh. 1 - Prob. 44QCh. 1 - Prob. 45QCh. 1 - Prob. 46QCh. 1 - Prob. 47QCh. 1 - Prob. 48QCh. 1 - Prob. 49QCh. 1 - Mercury, another serious air pollutant, is not...Ch. 1 - The EPA oversees the Presidential Green Chemistry...Ch. 1 - Prob. 52QCh. 1 - Here are two scanning electron micrograph images...Ch. 1 - Prob. 54QCh. 1 - Prob. 55QCh. 1 - Prob. 56QCh. 1 - Prob. 57QCh. 1 - You may have admired the beauty of hardwood...Ch. 1 - Prob. 59Q
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