Problem 6.34 Titanium metal requires a photon with a minimum energy of 6.94×1019

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Problem 6.34

Titanium metal requires a photon with a minimum energy of 6.94×1019J to emit electrons.

Part A

What is the minimum frequency of light necessary to emit electrons from titanium via the photoelectric effect?

Express your answer using three significant figures.

1.05×1015

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Part B

What is the wavelength of this light?

Express your answer using three significant figures.

286

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Part C

Is it possible to eject electrons from titanium metal using visible light?

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Part D

If titanium is irradiated with light of 233 nm, what is the maximum possible kinetic energy of the emitted electrons?

Express your answer using three significant figures.

1.5891019

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Part E

What is the maximum number of electrons that can be freed by a a burst of light whose total energy is 2.00 J.

Express your answer using three significant figures.

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Problem 6.29

One type of sunburn occurs on exposure to UV light of wavelength in the vicinity of 300 nm .

Part A

What is the energy of a photon of this wavelength?

6.62×1019

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Part B

What is the energy of a mole of these photons?

1084642.61751

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Part C

How many photons are in a 1.10 mJ burst of this radiation?

1.66•1015

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Part D

These UV photons can break chemical bonds in your skin to cause sunburn—a form of radiation damage. If the 300 nm radiation provides exactly the energy to break an average chemical bond in the skin, estimate the average energy of these bonds in kJ/mol.

3.99•1012

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Problem 6.55

Part A

For n=4, what are the possible values of l?

Enter your answers in ascending order separated by a commas.

0,1,2,3

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Correct

Part B

For l=2, what are the possible values of ml?

Enter your answers in ascending order separated by a commas.

-2,-1,0,1,2

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Correct

Part C

If ml is 2, what are the possible values for l (for all atoms in their ground states that are known to exist)?

Enter your answers in ascending order separated by a commas.

1,2,3,4

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Problem 6.34

Titanium metal requires a photon with a minimum energy of 6.94×1019J to emit electrons.

Part A

What is the minimum frequency of light necessary to emit electrons from titanium via the photoelectric effect?

Express your answer using three significant figures.

=

1.05×1015

  s1  

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Correct

Part B

What is the wavelength of this light?

Express your answer using three significant figures.

=

286

  nm  

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Correct

Part C

Is it possible to eject electrons from titanium metal using visible light?

Yes, it is possible. No, it is impossible.

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Correct

Part D

If titanium is irradiated with light of 233 nm, what is the maximum possible kinetic energy of the emitted electrons?

Express your answer using three significant figures.

E =

1.5891019

  J  

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Correct

Part E

What is the maximum number of electrons that can be freed by a a burst of light whose total energy is 2.00 J.

Express your answer using three significant figures.

N = electrons

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Problem 6.29

One type of sunburn occurs on exposure to UV light of wavelength in the vicinity of 300 nm .

Part A

What is the energy of a photon of this wavelength?

E =

6.62×1019

  J  

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Correct

Part B

What is the energy of a mole of these photons?

E =

1084642.61751

  J  

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Incorrect; Try Again; 3 attempts remaining

Part C

How many photons are in a 1.10 mJ burst of this radiation?

N =

1.66•1015

photons

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Part D

These UV photons can break chemical bonds in your skin to cause sunburn—a form of radiation damage. If the 300 nm radiation provides exactly the energy to break an average chemical bond in the skin, estimate the average energy of these bonds in kJ/mol.

averagebondenergy =

3.99•1012

  kJ/mol  

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Incorrect; Try Again; 5 attempts remaining

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Problem 6.55

Part A

For n=4, what are the possible values of l?

Enter your answers in ascending order separated by a commas.

0,1,2,3

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Correct

Part B

For l=2, what are the possible values of ml?

Enter your answers in ascending order separated by a commas.

-2,-1,0,1,2

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Correct

Part C

If ml is 2, what are the possible values for l (for all atoms in their ground states that are known to exist)?

Enter your answers in ascending order separated by a commas.

1,2,3,4

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Incorrect; Try Again; 4 attempts remaining

Explanation / Answer

There are multiple questions here . i am allowed to answer only 1 at a time. I will answer 1st one for you. Please ask other as different question
problem 6.34:
A,B,C and D are correct
E)
total energy = 2*10^-6 J
E to eject 1 electron = 6.94*10^-19 J

number of electron = total energy / energy of 1 electron
                                          = (2*10^-6) / (6.94*10^-19 )
                                          = 2.88*10^12

problem 6.29.
A is correct.
B)
Energy of 1 photon = 6.62*10^-19 J (as calculated in A)
1 mol of photon = 6.022*10^23 photon
So,
energy of 1 mol of photon = 6.022*10^23 * 6.62*10^-19 = 398656.4 J

C)
number of photon = total energy / energy of each photon
                                       = (1.1*10^-3) / (6.62*10^-19)
                                       = 1.66*10^15

D)
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