Principles of Modern Chemistry
8th Edition
ISBN: 9781305079113
Author: David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher: Cengage Learning
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Textbook Question
Chapter 4, Problem 8P
Ultrasonic waves have frequencies too high to be detected by the human ear, but they can be produced and detected by vibrating crystals. Calculate the wavelength of an ultrasonic wave of frequency
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111
States of Matter
Understanding conceptual components of the enthalpy of solution
0/5
Ge
A small amount of acetonitrile (CH, CN) is dissolved in a large amount of water. Imagine separating this process into the four stages sketched below. (These
sketches show only a portion of the substances, so you can see the density and distribution of atoms and molecules in them.)
CH,CN
H₂O
B
88
C
Use these sketches to answer the questions in the table below.
The enthalpy of solution AH is negative
soln
when CH3CN dissolves in water. Use this
information to list the stages in order of increasing
enthalpy.
Would heat be absorbed or released if the system
moved from Stage C to D?
What force would oppose or favor the system
moving from Stage C to D? Check all that apply.
1
absorbed
O released
neither absorbed nor released.
none
O ionic bonding force
covalent bonding force…
In a system with an anodic overpotential, the variation of ŋ as a function of
the current density:
1. at low fields is linear 2. at higher fields, it follows Tafel's law
Find the range of current densities for which the overpotential has the same
value as when calculated for cases 1 and 2 (maximum relative difference of
5% with respect to the behavior for higher fields). To which overpotential
range does this correspond?
Data: 10 = 1.5 mA cm², T = 300°C, ẞ = 0.64, R = 8.314 J K 1 mol¹ and F = 96485
C mol-1.
Indicate 10.6 with only one significant figure.
Chapter 4 Solutions
Principles of Modern Chemistry
Ch. 4 - Some water waves reach the beach at a rate of one...Ch. 4 - The spacing between bands of color in a chemical...Ch. 4 - An FM radio station broadcasts at a frequency of...Ch. 4 - The gamma rays emitted by 60Co are used in...Ch. 4 - Radio waves of wavelength 6.00102m can be used to...Ch. 4 - An argon ion laser emits light of wavelength of...Ch. 4 - The speed of sound in dry air at 20°C is 343.5ms1...Ch. 4 - Ultrasonic waves have frequencies too high to be...Ch. 4 - The maximum in the blackbody radiation intensity...Ch. 4 - Use the data in Figure 4.8 to estimate the ratio...
Ch. 4 - Excited lithium atoms emit light strongly at a...Ch. 4 - Excited mercury atoms emit light strongly at a...Ch. 4 - Barium atoms in a flame emit light as they undergo...Ch. 4 - Potassium atoms in a flame emit light as they...Ch. 4 - The sodium D-line is actually a pair of closely...Ch. 4 - The power output of a laser is measured by its...Ch. 4 - In a FranckHertz experiment on sodium atoms, the...Ch. 4 - In a FranckHertz experiment on hydrogen atoms, the...Ch. 4 - Use the Bohr model to calculate the radius and the...Ch. 4 - He+ ions are observed in stellar atmospheres. Use...Ch. 4 - The radiation emitted in the transition from n=3...Ch. 4 - Prob. 22PCh. 4 - Prob. 23PCh. 4 - When an intense beam of green light is directed...Ch. 4 - Cesium frequently is used in photocells because...Ch. 4 - Alarm systems use the photoelectric effect. A beam...Ch. 4 - Light with a wavelength of 2.50107m falls on the...Ch. 4 - Calculate the maximum wavelength of...Ch. 4 - Prob. 29PCh. 4 - Prob. 30PCh. 4 - Calculate the de Broglie wavelength of the...Ch. 4 - Calculate the de Broglie wavelength of the...Ch. 4 - Prob. 33PCh. 4 - Prob. 34PCh. 4 - (a) The position of an electron is known to be...Ch. 4 - No object can travel faster than the speed of...Ch. 4 - (a) Using Equation 4.36, make a graph of the n=3...Ch. 4 - Using a simple particle-in-a-box model for the...Ch. 4 - Chapter 3 introduced the concept of a double bond...Ch. 4 - When metallic sodium is dissolved in liquid sodium...Ch. 4 - Prob. 41PCh. 4 - Prob. 42PCh. 4 - Prob. 43PCh. 4 - Prob. 44PCh. 4 - A piano tuner uses a tuning fork that emits sound...Ch. 4 - The distant galaxy called Cygnus A is one of the...Ch. 4 - Hot objects can emit blackbody radiation that...Ch. 4 - Compare the energy (in joules) carried by an X-ray...Ch. 4 - The maximum in Planck’s formula for the emission...Ch. 4 - Prob. 50APCh. 4 - When ultraviolet light of wavelength 131 nm...Ch. 4 - Express the speed of the electron in the Bohr...Ch. 4 - Photons are emitted in the Lyman series as...Ch. 4 - Prob. 54APCh. 4 - The energies of macroscopic objects, as well as...Ch. 4 - Prob. 56APCh. 4 - Prob. 57APCh. 4 - It has been suggested that spacecraft could be...Ch. 4 - Prob. 59APCh. 4 - The normalized wave function for a particle in a...Ch. 4 - A particle of mass m is placed in a...
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