Photosensitizers require high quantum yield of triplet state formation. The reason for this requirement is that...
Photosensitizers require high quantum yield of triplet state formation. The reason for this requirement is that the triplet state
A. contains very high energy
B. has relatively long lifetime
C. has many equilvalent energy states
D. can emit phosphorescence
Homework Answers
Answer )
B) Has relatively long life time.
Becase when life time of excited molecule is more. it gives time required to get react and conversion reactant to product.
Add Answer to:
Photosensitizers require high quantum yield of triplet state
formation. The reason for this requirement is that...
A Rydberg atom is one in which an electron is in a very high excited state...
A Rydberg atom is one in which an electron is in a very high excited state (n 40 or higher). Such atoms are useful for experiments that probe the transition from quantum- mechanical behavior to classical. Furthermore, these excited states have extremely long lifetimes (i.e., the electron will stay in this high excited state for a very long time). A hydrogen atom is in the n47 state. (a) What Is the lonization energy of the atom when it is in...
Need help with 1-3 Why does a compound in the excited triplet state undergo intersystem crossing...
Need help with 1-3
Why does a compound in the excited triplet state undergo intersystem crossing before returning to the ground state? Describe the difference between fluorescence and phosphorescence. Why does the formation of the diimide require temperatures in excess of 200 degree C? Identify the oxidation number of chromium in each of the following chemical species (a) Cr_2 O_7 (b) Cr_2 O_3 (c) CrSO_4 (d) Cr_2 S_3 In each of the following reactions, identify the oxidizing and reducing agents....
1. Which of the following statements is FALSE? Homeotherms can sustain a high level of physical...
1. Which of the following statements is FALSE? Homeotherms can sustain a high level of physical activity for long periods. Homeotherms require a very low amount of glucose for daily activities. Homeotherms can generate energy rapidly when the situation demands. Homeothermy allows organisms to function at a higher level in cold environments. Homeotherms have relatively higher metabolic rates than similar-sized poikilotherms. 2. Larger terrestrial animals (mammals, birds, and reptiles) acquire oxygen through __________. their skin air sacs the membranes in...
Question 9 Consider a quantum system comprising two indistinguishable particles which can occupy only three individual-particle...
Question 9 Consider a quantum system comprising two indistinguishable particles which can occupy only three individual-particle energy levels, with energies 81 0, 82 2 and E3 38.The system is in thermal equilibrium at temperature T. (a) Suppose the particles which can occupy an energy level. are spinless, and there is no limit to the number of particles (i) How many states do you expect this system to have? Justify your answer (ii) Make a table showing, for each state of...
1. The quantum states of a particle moving freely in a circle of radius r are...
1. The quantum states of a particle moving freely in a circle of radius r are described by (0) = Cewe where C is a constant, e denotes angle, n = 0, +1, +2,... is an integer identifying the quantum state of the particle, and wn is constant for a given n. a) Show that Un0 satisfies don d02 b) Find wn such that Un (@+ 2) = Un) c) Find the value of such that any two yn (0)...
5. A wave function for an electron in an atom is called an atomic orbital; this...
5. A wave function for an electron in an atom is called an atomic orbital; this atomic orbital describes a region of space in which there is a high probability of finding the electron. Energy changes within an atom are the result of an electron changing from a wave pattern with one energy to a wave pattern with a different energy (usually accompanied by the absorption or emission of a photon of light). Each electron in an atom is described...
Chapter 6 Homework For math related questions show all of your work and use the correct...
Chapter 6 Homework For math related questions show all of your work and use the correct Answer each question completely. number of significant figures. Anx-ray has a wavelength of 0.13 nm. Calculate the frequency for this wavelength. Calculate the 1. energy (in J) of one photon of this radiation. Calculate the energy in 1 mole of photons. 2. Which of these electron transitions correspond to absorption of energy and which to emission? Which would have the smallest absorption of energy?...
question no 4.22, statistical physics by Reif Volume 5 4.92 Mean energy of a harmonic oscillator A harmonic oscillator...
question no 4.22, statistical physics by Reif Volume 5
4.92 Mean energy of a harmonic oscillator A harmonic oscillator has a mass and spring constant which are such that its classical angular frequency of oscllation is equal to w. In a quantum- mechanical description, such an oscillator is characterized by a set of discrete states having energies En given by The quantum number n which labels these states can here assume all the integral values A particular instance of a...
Which of the following is an INCORRECT statement regarding the? testator's signature requirement for making a...
Which of the following is an INCORRECT statement regarding the? testator's signature requirement for making a valid? will? A. Wills need not be signed. B. Courts have held that an? "X" can constitute a valid signature on a will if it can be proven that the testator intended it to be his or her signature. C. Courts have held that the? testator's nickname can constitute a valid signature on a will if it can be proven that the testator intended...
where lo, l1 are the angular momentum quantum numbers for the lower and upper states respectively of the atomic transition (s,p, d,...or 1-0, 1, 2, . . .). For example, for the 4s-3p transition for s...
where lo, l1 are the angular momentum quantum numbers for the lower and upper states respectively of the atomic transition (s,p, d,...or 1-0, 1, 2, . . .). For example, for the 4s-3p transition for sodium (see Fig. 1 below) has n0-3, nı = 4, 10-1, 11-0 Transition levels of Sodium 6s 4.0 d series s series 2. Ep-3 p series Figure T: Transition levels for the neutral sodium atom The 3p-3s transition produces strong yellow emission spectral lines called...
A Rydberg atom is one in which an electron is in a very high excited state (n 40 or higher). Such atoms are useful for experiments that probe the transition from quantum- mechanical behavior to classical. Furthermore, these excited states have extremely long lifetimes (i.e., the electron will stay in this high excited state for a very long time). A hydrogen atom is in the n47 state. (a) What Is the lonization energy of the atom when it is in...
Need help with 1-3
Why does a compound in the excited triplet state undergo intersystem crossing before returning to the ground state? Describe the difference between fluorescence and phosphorescence. Why does the formation of the diimide require temperatures in excess of 200 degree C? Identify the oxidation number of chromium in each of the following chemical species (a) Cr_2 O_7 (b) Cr_2 O_3 (c) CrSO_4 (d) Cr_2 S_3 In each of the following reactions, identify the oxidizing and reducing agents....
Question 9 Consider a quantum system comprising two indistinguishable particles which can occupy only three individual-particle energy levels, with energies 81 0, 82 2 and E3 38.The system is in thermal equilibrium at temperature T. (a) Suppose the particles which can occupy an energy level. are spinless, and there is no limit to the number of particles (i) How many states do you expect this system to have? Justify your answer (ii) Make a table showing, for each state of...
1. The quantum states of a particle moving freely in a circle of radius r are described by (0) = Cewe where C is a constant, e denotes angle, n = 0, +1, +2,... is an integer identifying the quantum state of the particle, and wn is constant for a given n. a) Show that Un0 satisfies don d02 b) Find wn such that Un (@+ 2) = Un) c) Find the value of such that any two yn (0)...
5. A wave function for an electron in an atom is called an atomic orbital; this atomic orbital describes a region of space in which there is a high probability of finding the electron. Energy changes within an atom are the result of an electron changing from a wave pattern with one energy to a wave pattern with a different energy (usually accompanied by the absorption or emission of a photon of light). Each electron in an atom is described...
Chapter 6 Homework For math related questions show all of your work and use the correct Answer each question completely. number of significant figures. Anx-ray has a wavelength of 0.13 nm. Calculate the frequency for this wavelength. Calculate the 1. energy (in J) of one photon of this radiation. Calculate the energy in 1 mole of photons. 2. Which of these electron transitions correspond to absorption of energy and which to emission? Which would have the smallest absorption of energy?...
question no 4.22, statistical physics by Reif Volume 5
4.92 Mean energy of a harmonic oscillator A harmonic oscillator has a mass and spring constant which are such that its classical angular frequency of oscllation is equal to w. In a quantum- mechanical description, such an oscillator is characterized by a set of discrete states having energies En given by The quantum number n which labels these states can here assume all the integral values A particular instance of a...
where lo, l1 are the angular momentum quantum numbers for the lower and upper states respectively of the atomic transition (s,p, d,...or 1-0, 1, 2, . . .). For example, for the 4s-3p transition for sodium (see Fig. 1 below) has n0-3, nı = 4, 10-1, 11-0 Transition levels of Sodium 6s 4.0 d series s series 2. Ep-3 p series Figure T: Transition levels for the neutral sodium atom The 3p-3s transition produces strong yellow emission spectral lines called...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago