When the electrons are able to flow through the neighboring pi systems, the phenomenon of resonance takes place. Resonance structures are defined as the forms of a molecule having the same chemical connectivity, but the different distribution pattern for the electrons around the structure. To determine: The different resonance structures for the NCO − ion; prediction of the best Lewis structure on the basis of the formal charge.
When the electrons are able to flow through the neighboring pi systems, the phenomenon of resonance takes place. Resonance structures are defined as the forms of a molecule having the same chemical connectivity, but the different distribution pattern for the electrons around the structure. To determine: The different resonance structures for the NCO − ion; prediction of the best Lewis structure on the basis of the formal charge.
Solution Summary: The author explains the resonance structures for the NCO- ion.
Concept introduction: When the electrons are able to flow through the neighboring pi systems, the phenomenon of resonance takes place. Resonance structures are defined as the forms of a molecule having the same chemical connectivity, but the different distribution pattern for the electrons around the structure.
To determine: The different resonance structures for the
NCO− ion; prediction of the best Lewis structure on the basis of the formal charge.
(b)
Interpretation Introduction
Concept introduction: When the electrons are able to flow through the neighboring pi systems, the phenomenon of resonance takes place. Resonance structures are defined as the forms of a molecule having the same chemical connectivity, but the different distribution pattern for the electrons around the structure.
The table includes macrostates characterized by 4 energy levels (&) that are
equally spaced but with different degrees of occupation.
a) Calculate the energy of all the macrostates (in joules). See if they all have
the same energy and number of particles.
b) Calculate the macrostate that is most likely to exist. For this macrostate,
show that the population of the levels is consistent with the Boltzmann
distribution.
macrostate 1 macrostate 2 macrostate 3
ε/k (K) Populations
Populations
Populations
300
5
3
4
200
7
9
8
100
15
17
16
0
33
31
32
DATO: k = 1,38×10-23 J K-1
Don't used Ai solution
In an experiment, the viscosity of water was measured at different
temperatures and the table was constructed from the data obtained.
a) Calculate the activation energy of viscous flow (kJ/mol).
b) Calculate the viscosity at 30°C.
T/°C
0
20
40
60
80
η/cpoise 1,972 1,005 0,656 0,469 0,356
Chapter 3 Solutions
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