Organic Chemistry: A Guided Inquiry
2nd Edition
ISBN: 9780618974122
Author: Andrei Straumanis
Publisher: Cengage Learning
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Chapter 9, Problem 14CTQ
Interpretation Introduction
Interpretation: The more stable nature of cyclopropane in an acidic medium compare to the
Concept introduction: Cycloalkanes are cyclic saturated hydrocarbons. With the presence of a cyclic ring, they are less stable compared to open-chain hydrocarbons. The stability of cycloalkanes depends on the number of carbon atoms present in the cyclic ring.
Epoxide ring is also a three-member ring structure with two carbon atoms and one oxygen atom in the molecule.
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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
Please correct answer and don't used hand raiting
Chapter 9 Solutions
Organic Chemistry: A Guided Inquiry
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