Chemistry (OER)
2nd Edition
ISBN: 9781947172616
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 20, Problem 49E
Write the two-resonance structures for the acetate ion.
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In the video, we looked at the absorbance of a certain substance and how it varies
depending on what wavelength of light we are looking at. Below is a similar scan of a
different substance. What color BEST describes how this substance will appear?
Absorbance (AU)
Violet
Blue
Green
Orange
1.2
1.0-
0.8-
0.6-
0.4-
0.2
0.0
450
500
550
600
650
700
Wavelength (nm)
violet
indigo
blue
green
yellow orange
red
Red
O Cannot tell from this information
In the above graph, what causes -450 nm wavelength of light to have a higher
absorbance than light with a -550 nm wavelength? Check all that are true.
The distance the light travels is different
The different data points are for different substances
The concentration is different at different times in the experiment
Epsilon (molar absortivity) is different at different wavelengths
5. a. Data were collected for Trial 1 to determine the molar mass of a nonvolatile solid solute when dissolved in cyclo-
hexane. Complete the table for the analysis (See Report Sheet). Record calculated values with the correct number
of significant figures.
B. Freezing Point of Cyclohexane plus
Calculation Zone
Unknown Solute
2. Mass of cyclohexane (g)
10.14
Part C.4
3. Mass of added solute (g)
0.255
C. Calculations
1. k; for cyclohexane (°C⚫ kg/mol)
20.0
2. Freezing point change, AT, (°C)
3.04
Part C.6
3. Mass of cyclohexane in solution (kg)
4. Moles of solute, total (mol)
Show calculation.
5. Mass of solute in solution, total (g)
6. Molar mass of solute (g/mol)
Show calculation.
Chapter 20 Solutions
Chemistry (OER)
Ch. 20 - Write the chemical formula and Lewis structure of...Ch. 20 - What is the difference between the hybridization...Ch. 20 - On a microscopic level, how does the reaction of...Ch. 20 - On a microscopic level, how does the reaction of...Ch. 20 - Explain why unbranched alkenes can form geometric...Ch. 20 - Explain why these two molecules are not isomers:Ch. 20 - Explain why these two molecules are not isomers:Ch. 20 - How does the carbon-atom hybridization change when...Ch. 20 - Write the Lewis structure and molecular formula...Ch. 20 - Write the chemical formula, condensed formula, and...
Ch. 20 - Give the complete IUPAC name for each of the...Ch. 20 - Give the complete IUPAC name for each of the...Ch. 20 - Butane is used as a fuel in disposable lighters....Ch. 20 - Write Lewis structures and name the five...Ch. 20 - Write Lewis structures for the Cis -trans isomers...Ch. 20 - Write structures for the three isomers of the...Ch. 20 - Isooctane is the common name of the isomer of...Ch. 20 - Write Lewis structures and IUPAC names for the...Ch. 20 - Write Lewis structures and IUPAC names for all...Ch. 20 - Name and write the structures of all isomers of...Ch. 20 - Write the structures for all the isomers of the...Ch. 20 - Write Lewis structures and describe the molecular...Ch. 20 - Benzene is one of the compounds used as an octane...Ch. 20 - Teflon is prepared by the polymerization of...Ch. 20 - Write two complete, balanced equations for each of...Ch. 20 - Write two complete, balanced equations for each of...Ch. 20 - What mass of 2-bromopropane could be prepared from...Ch. 20 - Acetylene is a very weak acid; however, it will...Ch. 20 - Ethylene can be produced by the pyrolysis of...Ch. 20 - Why do the compounds hexane, hexanol, and hexane...Ch. 20 - Write condensed formulas and provide IUPAC names...Ch. 20 - Give the complete IUPAC name for each of the...Ch. 20 - Give the complete IUPAC name and the common name...Ch. 20 - Write the condensed structures of both isomers...Ch. 20 - Write the condensed structures of all isomers with...Ch. 20 - Draw the condensed formulas for each of the...Ch. 20 - MTBE, Methyl tert -butyl ether, CH3OC(CH3)3, is...Ch. 20 - Write two complete balanced equations for each of...Ch. 20 - Write two complete balanced equations for each of...Ch. 20 - Order the following molecules from least to most...Ch. 20 - Predict the products of oxidizing the molecules...Ch. 20 - Predict the products of reducing the following...Ch. 20 - Explain why it is not possible to possible a...Ch. 20 - How does hybridization of the substituted carbon...Ch. 20 - Fatty acids are carboxylic acids that have long...Ch. 20 - Write a condensed structural formula, such as...Ch. 20 - Write a condensed structural formula, such as...Ch. 20 - The foul odor of rancid butter is caused by...Ch. 20 - Write the two-resonance structures for the acetate...Ch. 20 - Write two complete, balanced equations for each of...Ch. 20 - Write two complete balanced equations for each of...Ch. 20 - Yields in organic reactions are sometimes low....Ch. 20 - Alcohols A, B and C all have the composition C4H...Ch. 20 - Write the Lewis structures of both isomers with...Ch. 20 - What is the molecular structure about the nitrogen...Ch. 20 - Write the two resonance structures for the...Ch. 20 - Draw Lewis structures for pyridine and its...Ch. 20 - Write the Lewis structures of all isomers with the...Ch. 20 - Write two complete balanced equations for the...Ch. 20 - Write two complete, balanced equations for each of...Ch. 20 - Identify any carbon atoms that change...Ch. 20 - Identify any carbon atoms that change...Ch. 20 - Identify any carbon atoms that change...
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- 1. This experiment is more about understanding the colligative properties of a solution rather than the determination of the molar mass of a solid. a. Define colligative properties. b. Which of the following solutes has the greatest effect on the colligative properties for a given mass of pure water? Explain. (i) 0.01 mol of CaCl2 (ii) 0.01 mol of KNO3 (iii) 0.01 mol of CO(NH2)2 (an electrolyte) (an electrolyte) (a nonelectrolyte)arrow_forward5. b. For Trials 2 and 3, the molar mass of the solute was 151 g/mol and 143 g/mol respectively. a. What is the average molar mass of the solute ? b. What are the standard deviation and the relative standard deviation (%RSD) for the molar mass of the solute ?arrow_forwardShow work. Don't give Ai generated solutionarrow_forward
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