It is common to use rotation-inversion axes (rather than rotation-reflection axes) to classify the symmetry of crystals. Any Sn axis is equivalent to a rotation-inversion axis (symbolized by p) whose order p may differ from n. A rotation-inversion operation consists of rotation by 2Ï€/p radians followed by inversion. Show thatThus we have the following correspondence:Give the next three pairs of entries in this table.
If the solutions are quantum fileds, rather than wavefunctions,
then A and B behave different mathematically. They are now
non-commuting variables that satisfy the following:
A*A+AA* = n
B*B+BB* = m
A*B-BA* = 0
B*A-AB* = 0
where n and m are quantum numbers, and n represents the number
of particles present in the field, and m the number of
anti-particls. For a general solution ψ=ψ+ +
ψ- , show that the density of ρ given in problem below
now...
When discussing the multiplication of viruses,
virologist prefer to call the process replication rather than
production. Why do you think so? Would you agree with virologist
that 'replication' is the better term. Elaborate
Today Macro-economists and policy makers are discussing the
benefits of fixed rules rather than allowing the Central Bank
discretion in it's making Monetary Policy. What are your views on
this topic and why?
What is the role of kinetic energy quantization in covalent bond
formation? [keywords: particle-in-a-box, length, quantum state,
energy, kinetic, hydrogen atom, hydrogen molecule, covalent bond
energy...]
A transport layer protocol uses the id of the process rather
than the port number to specify the destination. (Explain the
reason)
1. Is there any problem for senders who wish to connect to a
well-defined service (for example, Apachewebserver)?
2. Will there be any problems with the process of multiple
network connections?
3. If the host has a different operating system, will there be
any problem?
Bonding and Molecular Geometry
Pre-Laboratory Question
1. Most elements exist as components of compounds rather than in
a free state. Explain why.
2. Use colored pencils to lightly shade each element in the
Periodic Table of Electronegativity Values. Color 1 Color 2 Color 3
Color 4 0 – 0.9 1.0 – 1.9 2.0 – 2.9 3.0 – 4.0 Laboratory
Questions
1. How does electronegativity influence the bond character
between two elements?
2. Describe the conditions that make covalent compounds
polar....
If the maximum recorded temperature is used, rather than the
extrapolated temperature, will the measured specific heat capacity
of the metal be higher or lower than the real value? Explain.
(Coffee Cup Calorimetry)
A. The number of jobs created, rather than the
unemployment rate, gives a more timely indication of the state of
the economy. Explain what thinking must lie behind this
claim.
B. If the population 16 years of age and older is 160 million,
the number of discouraged works is 10 million, the labor force is
110 million, and total employment is 90 million, what is the
measured unemployment rate?
C. Supposed that the population over age 15 is 140 million,...
1. If by mistake, chemist used 100% ethanol rather than THF as a
solvent, would the synthesis proceed as expected? Why or why
not?
2. Why is bromotoluene added dropwise to the reaction flask
rather than all at once?
3. Draw a dipole moment (see chapter 1) to explain the polarity
of the following Grignard reagent?
MgBr
1. In this reaction we will be heating butadiene sulfone to
perform a Diels-Alder reaction. What side product is generated upon
heating butadiene...