What is the energy, in joules, of one mole of photons associated with radiation
ID: 871651 • Letter: W
Question
What is the energy, in joules, of one mole of photons associated with radiation that has a frequency of 6.336 times 1013 2.528 times 108 J 3.882 times 1014 J 3.955 times 10 - 7 J 4.198 times 10 - 18 J Which statement is true? The line spectra of elements are the same provided they belong to the same family. The line spectra of elements are the same provided they belong to the same family and are combined with oxygen. The line spectra of elements are the same provided they belong to the same family and are in the same physical state. The line spectra of elements can be used for separation of elements from mixtures. The line spectra of elements can be used to identify the elements Which statement is true concerning the spectrum of hydrogen obtained from a gas discharge tube A photon is absorbed as the electron goes from a state with a higher energy to one with a lower energy. A photon is absorbed as the electron goes from a state with a lower energy to one with a higher energy. A photon is emitted as the electron goes from a state with a higher energy to one with a lower energy. A photon is emitted as the electron goes from a state with a lower energy to one with a higher energy. Calculate the energy required to excite a hydrogen atom by causing an electronic transition from the energy level with n = 1 to the level with n = 4. Recall that the quantized energies of the levels in the hydrogen atom arc given by: En = -2.179 times 10-18/n2 J 2.017 times 10-29 J 2.043 times 10-18 J 2.192 times 105 J 2.254 times 10-18 J The de Broglie relationship provides a link between which two properties of the electron? The mass and the charge. The mass and the energy Its energy and its charge The orbit and its wavelike movements Its wave and particle properties. The first description of the electron in the hydrogen atom by application of the wave nature of matter was presented by Louis de Broglie. Werner von Heisenberg. Wolfgang Pauli. Ernest Rutherford. Erwin Schrodinger.Explanation / Answer
5) answer D) 4.198 x 10^-18 J
energy (E) = h v
h = plank constant = 6.625 x 01^34 J S
v = frequency = 6.336 x 10^15 Hz
E = 6.625 x 10^-34 x 6.336 x 10^15
= 4.198 x 10^-18 J
note: in the problem the power is not visible clearly . i thought it is 10^15 . if any mistake in power please just change power answer is right.
6) answer E) ; the line spectra can be used to identify the elements
line spectra Spectral lines are often used to identify atoms and molecules from their characteristic spectral lines.
7) answer C) photon is emitted and electron goes from higher energy to lower energy
in the emission spectra of Hydrogen elecrtons jumps from higher energy orbital to lower energy orbiltal . due to this transition photons are emitted.
E2-E1 = hv
in the emission specrta of hydrogen we can observe lyman, balmer, paschan, braket and pfund series.
8) answer : B) 2.043 x 10^-18 J
E= -2.179 x 10^-18 [1/n12- 1/n22]
= -2.179 x 10^-18 [1/12- 1/ 42]
= -2.179 x 10^-18 x 15/16
= -2.043 x 10^-18
9) answer D) the orbit and its wavelike movement
10) answer E) Erwin Schrodinger
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