ahmedabudief

Dr. Ahmed Mohammed Abu-Dief Mohammed

Assistant Professor - Assistant professor of Inorganic and Physical Chemistry

Faculty of science

Address: Behind hospital of Sohag University - Ali Ebn Abi Taleb Street

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2019-12-09 07:04:40 | 28 | Physical Chemistry 3
number of photons
* Calculate the number of photons emitted by a 100 W yellow lamp in 1.0 s. * Take the wavelength of yellow light as 560 nm and assume 100 per cent efficiency. Read more

2019-12-01 10:35:31 | 13 | Physical Chemistry 3
The bond  length
From microwave spectroscopy, bond lengths can be determined with a correspondingly high precision, as illustrated in this example. From the rotational microwave spectrum of 1H35Cl, we find that _B __= _10.59342 cm-1. Given that the masses of 1H and 35Cl are 1.0078250 and 34.9688527 amu, respectively, determine the bond length of the 1H35Cl molecule. Read more

2019-12-01 09:44:22 | 14 | Physical Chemistry 3
The rotational  constant
The first rotational line in the rotational spectrum of CO is observed at 3.84235 cm-1. Calculate the rotational constant (B) and bond length of CO. The relative atomic weight C =12.00 and O = 15.9994, the absolute mass of H= 1.67343x10-27 kg. Read more

2019-11-22 10:40:01 | 15 | Physical Chemistry 3
Bohr’s Theory
ACCORDING TO BOHR’S THEORY, CALCULATE THE ENERGY OF THE THIRD LEVEL OF HYDROGEN ATOM. (RH = 2.179 X 10-18 J)ACCORDING TO BOHR’S THEORY, CALCULATE THE ENERGY OF THE THIRD LEVEL OF HYDROGEN ATOM. (RH = 2.179 X 10-18 J)ACCORDING TO BOHR’S THEORY, CALCULATE THE ENERGY OF THE THIRD LEVEL OF HYDROGEN ATOM. (RH = 2.179 X 10-18 J)ACCORDING TO BOHR’S ... Read more

2019-11-22 10:38:45 | 34 | Physical Chemistry 3
molecular spectra
* COMPARE BETWEEN ATOMIC AND MOLECULAR SPECTRA. (1 MARK) Read more

2019-11-22 10:38:12 | 19 | Physical Chemistry 3
Hamiltonian2
* THE HAMILTONIAN FOR THE ELECTRON AND A NUCLEUS OF MASS MN IS ………………………………………………………………………………………………………………………………………………………………………………………………THE HAMILTONIAN FOR THE ELECTRON AND A NUCLEUS OF MASS MN IS ………………………………………………………………………………………………………………………………………………………………………………………………THE HAMILTONIAN FOR THE ELECTRON AND A NUCLEUS OF MASS MN IS ……………………………………………………………………………………………………………………………………………………………………………………………… Read more

2019-11-22 09:54:53 | 35 | Physical Chemistry 3
ionization energy
* THE MINIMUM ENERGY REQUIRED TO REMOVE AN ELECTRON FROM N = 1 TO N = ∞ IS CALLED: * The kinetic energy * The ionization energy * The emission energy * The work function Read more

2019-11-22 09:52:34 | 41 | Physical Chemistry 3
Balmer series
* FROM THE SPECTRA OF A HYDROGENIC ATOM AND FOR THE BALMER SERIES, THE N1 IS EQUAL FROM THE SPECTRA OF A HYDROGENIC ATOM AND FOR THE BALMER SERIES, THE N1 IS EQUAL FROM THE SPECTRA OF A HYDROGENIC ATOM AND FOR THE BALMER SERIES, THE N1 IS EQUAL a)1 b) 2 c) 3 d) 4 Read more

2019-11-22 09:45:07 | 35 | Physical Chemistry 3
radial wavefunctions2
* WHICH OF THE FOLLOWING STATEMENT IS TRUE FOR THE RADIAL WAVEFUNCTIONS? * The radial wavefunctions depend on the values of both n and _l _ * The radial wavefunctions depend on the values of m_l_ . * Both (a) and (b) are true * Both (a) and (b) are wrong. Read more

2019-11-22 09:43:06 | 39 | Physical Chemistry 3
allowed
* WHICH OF THE FOLLOWING TRANSITIONS ARE ALLOWED IN THE NORMAL ELECTRONIC EMISSION SPECTRUM OF AN ATOM: WHICH OF THE FOLLOWING TRANSITIONS ARE ALLOWED IN THE NORMAL ELECTRONIC EMISSION SPECTRUM OF AN ATOM: WHICH OF THE FOLLOWING TRANSITIONS ARE ALLOWED IN THE NORMAL ELECTRONIC EMISSION SPECTRUM OF AN ATOM: * 5d →2s * 5p →3s * 6p →4f * 2s ... Read more