Question 2 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. 7.939 x 10-30 kg 7.939 x 10-29 kg 6.939 x 10-30 kg 5.939 x 10-31 kg Question 3
Question 2 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. 7.939 x 10-30 kg 7.939 x 10-29 kg 6.939 x 10-30 kg 5.939 x 10-31 kg Question 3
Question 2 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. 7.939 x 10-30 kg 7.939 x 10-29 kg 6.939 x 10-30 kg 5.939 x 10-31 kg Question 3
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.
7.939 x 10-30 kg
7.939 x 10-29 kg
6.939 x 10-30 kg
5.939 x 10-31 kg
Question 3
Choose (from given options) the correct IUPAC name for the compound shown above
1-ethyl-3,3-dimethylcyclohaxane
1,1-dimethyl-3-ethylcylohexene
1-Ethyl-3,3-dimethylcyclohexene
None of the provided IUPAC names is correct
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
3-Methybutanal
4-Methylbutanone
3-Methylbutanone
None of the above
Question 6
Calculate the wavelength associated with the transition of electron from n = 4 to n = 2.
486 nm
396 nm
525 nm
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?
2,2,4- Trimethyl-4-Iodohexane.
3-Iodo-3,5,5-trimethylhexane
3-Iodo-3,5,5-trimethylhexene
3-Iodo-2,2,4-trimethylhexane
Question 8
The correct IUPAC name for the compound show above is?
2-Methyl-3-ol-4-propyl-4-octene
(Z)-2-Methyl-4-propyl-3-ol-4-octene
2-Methyl-4-isopropane-4-octene-3-ol
(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?
− 4.008 x 10-19 J, emitted
3.048 x 10-19 J, emitted
− 5.16 x 10-17 J, absorbed
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
5d, total number of orbitals: 7
5f, total number of orbitals: 5
5d, total number of orbitals: 5
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
89 kJ, Exothermic reaction
-92 kJ, Endothermic reaction.
-97 KJ, Exothermic reaction
80 kJ, Endothermic reaction
Question 13
Above is a set of atomic orbitals. Note that not all of them are correctly presented. Which of these (from given options) has/have the correctly presented atomic orbitals?
d and e
e only
a and d
d only
Question 15
Which of the following statements is incorrect about atomic orbitals?
It describes the trajectory of electron in an atom
It is a single electron wave function
It defines the distribution of electron density in space
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:?
Oxygen
Fluorine
Nitrogen
Neon
Nitrogen
Oxygen
Fluorine
Neon
Nitrogen
Fluorine
Neon
Na+
None of the above sets is correct
Question 17
The correct IUPAC name for the compound shown in the figure above is?
1-Methyl-2-methylcyclohaxane
Trans-1-methyl-2-chlorocyclohexane
Trans-1-chloro-2-methylcyclohexane
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?
7.318 x 1014 photons
9.482 x 1015 photons
8.398 x 1017 photons
9.398 x 1014 photos
Question 20
The valence subshells of Nitrogen are incorrectly presented in most cases in the figure above. Choose one case (a-e) where it is correctly presented
a)
e)
c) and e)
d)
question 21
The correct IUPAC naming for the compound above is
2-Ethyl-3-pentene
(Z)-4-Ethyl-2-pentene
(E)-4-Ethyl-2-pentene
(E)-4-Methyl-2-hexene
Question 22
Consider the diagram shown above. The 2p orbitals for Oxygen were filled with electrons using which rule and/or principle?
Pauli exclusion principle
Hund's rule
Hund's Rule and Schrodinger atomic model
Hund's rule and Pauli exclusion principle
Question 23
Shown above in the figure above is a set of 3 general types of organic reactions. Select from the set of answer given, the correct general names for each type of reaction in the order from the top to the bottom
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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