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Chapter 18: Q3P (page 456)

Calculate the frequency (Hz), wavelength(cm-1), and energy (J/photon and J/mols of photon]) of visible light with a wavelength of 562 nm.

Short Answer

Expert verified

The answer to the above question is,

(a).The frequency isv=5.34.1014hzv~

(b).The wavenumber isv~=1.78.104cm-1

(c). The energy isE=213075J/mol

Step by step solution

01

Calculate frequency:

v=c位=3.108m/S2562.10-9mv=5.34.1014Hz

02

Calculate wavenumber:

v~=1位=1562.10-9mv~=1.78.106m-1v~=1.78.104cm-1

03

Calculate Energy:

E=h.v=6.626.10-34Js.534.1014HzE=3.54.10-19J/photonsE=3.54.10-19J.6.022.1023mol-1E=213075J/mol

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Most popular questions from this chapter

(a) How much energy (in kilojoules) is carried by one mole of photons of red light with位= 650 nm?

(b) How many kilojoules are carried by one mole of photons of violet light with位= 400 nm?

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Semi-xylenol orange is a yellow compound at pH 5.9but turns red when it reacts with Pb2+. A 2.025 - mLsample of semixylenol orange at pH 5.9was titrated with7.515脳10-4MPb(NO3)2with the following results:

Total role="math" localid="1663647483742" 渭尝Pb2+added

Absorbance at 490nmwavelength

Total 渭尝Pb2+added

Absorbance at490nmwavelength

0.0

6.0

12.0

18.0

24.0

30.0

36.0

0.227

0.256

0.286

0.316

0.345

0.370

0.399

42.0

48.0

54.0

60.0

70.0

80.0


0.425

0.445

0.448

0.449

0.450

0.447


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0.10mMKMnO4has an absorbance maximum of 0.26 at 525 nm in a

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