Chemistry: Principles and Reactions
8th Edition
ISBN: 9781305079373
Author: William L. Masterton, Cecile N. Hurley
Publisher: Cengage Learning
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Chapter 9, Problem 8QAP
Dichloromethane, CH2Cl2,is widely used as a "degreaser" and paint stripper. Its vapor pressure is 381.0 mm Hg at 21.9°C and 465.8 mm Hg at 26.90C. Estimate
(a) its heat of vaporization (ΔHvap).
(b) its normal boiling point.
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(a) The following synthesis of the molecule shown in the circle has a major problem. What is this problem? (2
pts)
1) HBr
(no peroxides)
2) H-
NaNH2
Br
3) NaNH,
4) CH3Br
5) H2, Pd
(b) Starting with the molecule shown below and any other materials with two carbons or less, write out an
alternate synthesis of the circled molecule. More than one step is needed. Indicate the reagent(s) and the major
product in all the steps in your synthesis. (5 pts)
2024 Fall Term (1) Organic Chemistry 1 (Lec)
CHEM 22204 02[6386] (Hunter College)
(c) Using the same starting material as in part (b) and any other materials win two carpons or less, write out
syntheses of the circled molecules shown below. More than one step is needed in each case. Indicate the
reagent(s) and the major product in all the steps in your synthesis. You may use reactions and products from
your synthesis in part (b). (5 pts)
alt
ons for
Free Response Questions
FRQ 1:
0/5
To spectrophotometrically determine the mass percent of cobalt in an ore containing cobalt and
some inert materials, solutions with known [Co?) are prepared and absorbance of each of the
solutions is measured at the wavelength of optimum absorbance. The data are used to create a
calibration plot, shown below.
0.90-
0.80-
0.70
0.60
0.50
0.40-
0.30
0.20-
0.10-
0.00-
0.005
0.010
Concentration (M)
0.015
A 0.630 g sample of the ore is completely dissolved in concentrated HNO3(aq). The mixture is diluted
with water to a final volume of 50.00 ml. Assume that all the cobalt in the ore sample is converted to
Co2+(aq).
a. What is the [Co2] in the solution if the absorbance of a sample of the solution is 0.74?
13
✗
b. Calculate the number of moles of Co2+(aq) in the 50.00 mL solution.
0.008 mols Co
Please correct answer and don't used hand raiting
Chapter 9 Solutions
Chemistry: Principles and Reactions
Ch. 9 - Prob. 1QAPCh. 9 - Prob. 2QAPCh. 9 - The vapor pressure of I2(s) at 30C is 0.466 mm Hg....Ch. 9 - Prob. 4QAPCh. 9 - Trichloroethane, C2H3Cl3 is used as a degreaser...Ch. 9 - p-Dichlorobenzene, C6H4Cl2, can be one of the...Ch. 9 - Prob. 7QAPCh. 9 - Dichloromethane, CH2Cl2,is widely used as a...Ch. 9 - Prob. 9QAPCh. 9 - Prob. 10QAP
Ch. 9 - At a resort in Sante Fe, New Mexico, the...Ch. 9 - Prob. 12QAPCh. 9 - Prob. 13QAPCh. 9 - Consider the following data for the vapor pressure...Ch. 9 - Referring to Figure 9.7, state what phase(s)...Ch. 9 - Referring to Figure 9.7, state what phase(s) is...Ch. 9 - Prob. 17QAPCh. 9 - Consider the phase diagram of the compound in...Ch. 9 - Prob. 19QAPCh. 9 - Prob. 20QAPCh. 9 - Given the following data about xenon,...Ch. 9 - Given the following data about CO2: • triple...Ch. 9 - A pure substance X has the following properties:...Ch. 9 - Prob. 24QAPCh. 9 - Prob. 25QAPCh. 9 - Arrange the following compounds in order of...Ch. 9 - Which of the following would you expect to show...Ch. 9 - Which of the following compounds would you expect...Ch. 9 - Prob. 29QAPCh. 9 - Prob. 30QAPCh. 9 - Explain in terms of forces between structural...Ch. 9 - Prob. 32QAPCh. 9 - Prob. 33QAPCh. 9 - In which of the following processes is it...Ch. 9 - For each of the following pairs, choose the member...Ch. 9 - Follow the directions for Question 35 for the...Ch. 9 - What are the strongest attractive forces that must...Ch. 9 - What are the strongest attractive forces that must...Ch. 9 - Prob. 39QAPCh. 9 - Prob. 40QAPCh. 9 - Of the four general types of solids, which one(s)...Ch. 9 - Of the four general types of solids, which one(s)...Ch. 9 - Prob. 43QAPCh. 9 - Prob. 44QAPCh. 9 - Give the formula of a solid containing Si that is...Ch. 9 - Prob. 46QAPCh. 9 - Prob. 47QAPCh. 9 - Describe the structural units in (a) C (graphite)...Ch. 9 - Molybdenum has an atomic radius of 0.145 nm. The...Ch. 9 - Nickel has an atomic radius of 0.162 nm. The edge...Ch. 9 - Lead (atomicradius=0.181nm) crystallizes with a...Ch. 9 - Iridium crystallizes in a face-centered unit cell....Ch. 9 - In the LiCl structure shown in Figure 9.21, the...Ch. 9 - Potassium iodide has a unit cell similar to that...Ch. 9 - Prob. 55QAPCh. 9 - Consider the CsCl cell (Figure 9.21). The ionic...Ch. 9 - Consider the sodium chloride unit cell shown in...Ch. 9 - Consider the CsCl unit shown in Figure 9.21. How...Ch. 9 - A 1.25-L clean and dry flask is sealed. The air in...Ch. 9 - Aluminum metal crystallizes with a face-centered...Ch. 9 - Consider a sealed flask with a movable piston that...Ch. 9 - Prob. 62QAPCh. 9 - Prob. 63QAPCh. 9 - Prob. 64QAPCh. 9 - Chloroform, CHCl3, has a normal boiling point of...Ch. 9 - Prob. 66QAPCh. 9 - Prob. 67QAPCh. 9 - In the blanks provided, answer the questions...Ch. 9 - Answer the questions below, by filling in the...Ch. 9 - Prob. 70QAPCh. 9 - Prob. 71QAPCh. 9 - What is the difference between (a) a covalent bond...Ch. 9 - Four shiny solids are labeled A, B, C, and D....Ch. 9 - Prob. 74QAPCh. 9 - The following data are given for CC14:...Ch. 9 - Iron crystallizes in a body-centered unit cell....Ch. 9 - Prob. 77QAPCh. 9 - Trichloroethane, C2H3Cl3, is the active ingredient...Ch. 9 - Prob. 79QAPCh. 9 - Prob. 80QAPCh. 9 - Prob. 81QAP
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