An object is moving at a speed of 220 m/s and the frequency associated with its de Broglie’s wavelength was determined to be 6.91 x 1014 Hz. Calculate the mass (kg) of the object and choose the correct answer from the given choices.
An object is moving at a speed of 220 m/s and the frequency associated with its de Broglie’s wavelength was determined to be 6.91 x 1014 Hz. Calculate the mass (kg) of the object and choose the correct answer from the given choices.
An object is moving at a speed of 220 m/s and the frequency associated with its de Broglie’s wavelength was determined to be 6.91 x 1014 Hz. Calculate the mass (kg) of the object and choose the correct answer from the given choices.
An object is moving at a speed of 220 m/s and the frequency associated with its de Broglie’s wavelength was determined to be 6.91 x 1014 Hz. Calculate the mass (kg) of the object and choose the correct answer from the given choices.
a
7.939 x 10-30 kg
b
7.939 x 10-29 kg
c
6.939 x 10-30 kg
d
5.939 x 10-31 kg
Question 5
Consider a compound with a formula: C5H10O (5 carbons, 10 hydrogens, one oxygen). A correct IUPAC name for one of ketone isomers of this compound is
a
3-Methybutanal
b
4-Methylbutanone
c
3-Methylbutanone
d
None of the above
Question 6
Calculate the wavelength associated with the transition of electron from n = 4 to n = 2.
a
486 nm
b
396 nm
c
525 nm
d
None of the above
Question 7
The reaction of 2,2,4-Trimethyl-3-hexene with hydrogen iodide (HI) will produce an alkyl halide product. The correct IUPAC name of the formed product is?
a
2,2,4- Trimethyl-4-Iodohexane.
b
3-Iodo-3,5,5-trimethylhexane
c
3-Iodo-3,5,5-trimethylhexene
d
3-Iodo-2,2,4-trimethylhexane
Question 8
The correct IUPAC name for the compound show above is?
a
2-Methyl-3-ol-4-propyl-4-octene
b
(Z)-2-Methyl-4-propyl-3-ol-4-octene
c
2-Methyl-4-isopropane-4-octene-3-ol
d
(E)-2-Methyl-4-propyl-4-octene-3-ol
Question 10
Calculate the change in energy involved in the transition of electrons from n = 4 to n = 2 . Was the energy emitted or absorbed during this transition?
a
− 4.008 x 10-19 J, emitted
b
3.048 x 10-19 J, emitted
c
− 5.16 x 10-17 J, absorbed
d
4.008 x 10-18 J, absorbed
Question 11
Consider an orbital subshell with n = 5 and l = 3. Determine the correct designation of this subshell and the total number of orbitals it contains. Choose the correct answer from provided options
a
5d, total number of orbitals: 7
b
5f, total number of orbitals: 5
c
5d, total number of orbitals: 5
d
None of the above
Question 12
Ammonia is produced directly from nitrogen and hydrogen by using the Haber process. The resulting chemical reaction is expressed as:
N2(g) 3H2(g) 2NH3(g)
Calculate the enthalpy change for the reaction and indicate the correct answer from options provided and further conclude if the reaction is endothermic or exothermic. Use Table provided with standard constant values for bonds broken/formed
a
89 kJ, Exothermic reaction
b
-92 kJ, Endothermic reaction.
c
-97 KJ, Exothermic reaction
d
80 kJ, Endothermic reaction
Question 15
Which of the following statements is incorrect about atomic orbitals?
a
It describes the trajectory of electron in an atom
b
It is a single electron wave function
c
It defines the distribution of electron density in space
d
It can be represented by boundary surface diagram.
Question 16
The following figure is a representation of atomic electronic configurations of different elements. In the order from top to bottom, the represented elements are:?
a
Oxygen
Fluorine
Nitrogen
Neon
b
Nitrogen
Oxygen
Fluorine
Neon
c
Nitrogen
Fluorine
Neon
Na+
d
None of the above sets is correct
Question 17
The correct IUPAC name for the compound shown in the figure above is?
a
1-Methyl-2-methylcyclohaxane
b
Trans-1-methyl-2-chlorocyclohexane
c
Trans-1-chloro-2-methylcyclohexane
d
Cis-1-chloro-2-methylcyclohexene
Question 19
A laser emits light of a certain frequency corresponding to a wavelength of 564 nm. If the total energy for this radiation is calculated to be 3.2 x 10-4 J, what is the total number of photons emitted?
Question 22
Consider the diagram shown above. The 2p orbitals for Oxygen were filled with electrons using which rule and/or principle?
a
Pauli exclusion principle
b
Hund's rule
c
Hund's Rule and Schrodinger atomic model
d
Hund's rule and Pauli exclusion principle
Definition Definition Organic compounds that have a carbonyl group, C = O, as their functional group. The carbonyl group in ketones is placed somewhere in the middle of the molecular structure, which means, the C=O is attached to two alkyl groups or benzene rings. Just like all other homologous series, the naming of ketones is done using a common suffix “-one”. The general molecular formula is C n H 2n O. Functional group of a ketone
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