Chemistry Atoms First2e
2nd Edition
ISBN: 9781947172647
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 20, Problem 56E
Technetium-99m has a half-life of 6.01 hours. If a patient injected with technetium-99m is safe to leave the hospital once 75% of the dose has decayed, when is the patient allowed to leave?
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In one electrode: Pt, H2(1 atm) | H+(a=1), the interchange current density at 298K is 0.79 mA·cm-2. If the voltage difference of the interface is +5 mV. What will be the correct intensity at pH = 2?. Maximum transfer voltage and beta = 0.5.
In a Pt electrode, H2(1 atm) | H+(a=1), the interchange current density of an electrode is 0.79 mA cm-2. ¿Qué corriente flow across the electrode of área 5 cm2 when the difference in potential of the interface is +5 mV?.
If the current voltage is n = 0.14 V, indicate which of the 2 voltage
formulas of the ley of Tafel must be applied
i
a
a) == exp (1-B).
xp[(1 - ß³):
Fn
Fn
a
b) == exp B
RT
RT
Chapter 20 Solutions
Chemistry Atoms First2e
Ch. 20 - Write the following isotopes in hyphenated form...Ch. 20 - Write the following isotopes in nuclide notation...Ch. 20 - For the following isotopes that have missing...Ch. 20 - For each of the isotopes in Exercise 20.1,...Ch. 20 - Write the nuclide notation, including charge if...Ch. 20 - Calculate the density of the M1224g nucleus in...Ch. 20 - What are the two principal differences between...Ch. 20 - The mass of the atom N1123a is 22.9893 arm.. (a)...Ch. 20 - Which of the following nuclei lie within the band...Ch. 20 - Which of the following nuclei lie within the band...
Ch. 20 - Write a brief description or definition of each of...Ch. 20 - Which of the various particles ( particles, ...Ch. 20 - Complete each of the following equations by adding...Ch. 20 - Complete each 0f the following equations: (a)...Ch. 20 - Write a balanced equation for each of the...Ch. 20 - Technetium-99 is prepared from 98Mo. Molybdenum-SS...Ch. 20 - The mass of the atom F919 is 18.99840 amu.. (a)...Ch. 20 - For the reaction C614N714+?, if 100.0 g of carbon...Ch. 20 - What are the types of radiation emitted by the...Ch. 20 - That changes occur to the atomic number and mass...Ch. 20 - What is the change in the nucleus that results...Ch. 20 - Many nuclides with atomic numbers greater than 83...Ch. 20 - Why is electron capture accompanied by the...Ch. 20 - Explain, in terms of Figure 20.2, how unstable...Ch. 20 - Which of the following nuclei is most likely to...Ch. 20 - The following nuclei do not lie in the band of...Ch. 20 - The following nuclei do not lie in the band of...Ch. 20 - Predict by what mode(s) of spontaneous radioactive...Ch. 20 - Write a nuclear reaction for each step in the...Ch. 20 - Write a nuclear reaction for each step in the...Ch. 20 - Define the term half-life and illustrate it with...Ch. 20 - A 1.00106 -g sample of nobelium, N102254o, has a...Ch. 20 - 239Pu is a nuclear waste byproduct with a...Ch. 20 - The isotope 208Tl undergoes decay with a...Ch. 20 - If 1.000 g of R88226a produces 0.0001 mL of the...Ch. 20 - The isotope S3890r one of the extremely hazardous...Ch. 20 - Technetium-99 is often used for assessing heart,...Ch. 20 - What is the age of mummified primate skin that...Ch. 20 - A sample of rock was found to contain 8.23 mg of...Ch. 20 - A laboratory investigation shows that a sample of...Ch. 20 - Plutonium was detected in trace amounts in natural...Ch. 20 - A B47e atom (mass = 7.0169 amu) decays into a L37i...Ch. 20 - A B58 atom (mass = 8.0246 amu) decays into B48...Ch. 20 - Isotopes such as 26Al (half-life: 7.2105 years)...Ch. 20 - Write a balanced equation for each of the...Ch. 20 - Write a balanced equation for each of the...Ch. 20 - Write the balanced nuclear equation for the...Ch. 20 - How does nuclear fission differ from nuclear...Ch. 20 - Both fusion and fission are nuclear reactions. Why...Ch. 20 - Cite the conditions necessary for a nuclear chain...Ch. 20 - Describe the components of a nuclear reactor.Ch. 20 - In usual practice, both a moderator and control...Ch. 20 - Describe how the potential energy of uranium is...Ch. 20 - The mass of a hydrogen atom (11H) is 1.007825 arm;...Ch. 20 - How can a radioactive nuclide be used to show that...Ch. 20 - Technetium-99m has a half-life of 6.01 hours. If a...Ch. 20 - Iodine that enters the body is stored in the...Ch. 20 - If a hospital were storing radioisotopes, what is...Ch. 20 - Based on what is known about Radon-222’s primary...Ch. 20 - Given specimens uranium-232 (t1/2=68.9y) and...Ch. 20 - A scientist is studying a 2.234 g sample of...Ch. 20 - Given specimens neon-24 (t1/2=3.38min) and...
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Similar questions
- If the current voltage is n = 0.14 V. Indicate which of the 2 formulas must be applied a) = a T = i exp[(1 - p) F Fn Fn b) i==exp B RTarrow_forwardTopic: Photochemistry and Photophysics of Supramoleculesarrow_forwardTwo cations that exchange an electron in an interface, the exchange density is worth 1.39 mA/cm2 and the current density is worth 15 mA/cm2 at 25°C. If the overvoltage is 0.14 V, calculate the reaction rate and symmetry factor. Data: R = 8,314 J mol-1 k-1: F = 96500 Carrow_forward
- With the help of the Tafel line, it is estimated that the interchange density of the VO2+/VO2+ system on the carbon paper has a value of 3 mA cm-2. Calculate a) the current density if the voltage has a value of 1.6 mV and the temperature is 25°C. b) the beta value of the anódico process if the Tafel pendulum is 0.6 V at 25°C. Data: R = 8.314 JK-1mol-1, y F = 96485 C mol-1.arrow_forwardApply the NANSTE law to the MnO4- + 8H+ + 5e- ⇄ Mn2+ + 4H2Oarrow_forwardIn the Nernst Law, how much is RT / F?arrow_forward
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