Question

Calculate structure factor S as a function of hkl for NaCl structure (assume the atomic form factors f are constant but different for Na and Cl) and discuss what would happen if the two atoms had the same atomic form factor.

Answer #1

Assume each salt disassociates 100% a) Calculate the ionic
strength of a 500mM solution of NaCl b) Calculate the ionic
strength of a 500mM solution of CaCl2 c) Discuss your answers to a
and b. Given they are the same concentration are the ionic
strengths equal or different? Explain.

Calculate the structure factor for monoatomic crystals in FCC
and diamond lattice symmetries. Discuss the extinction rules for
diffraction spots parametrized by the reciprocal lattice indices
(h, k.l). Compare the differencies in the rules for the two
crystals. What is the connection of the result to the lattice
planes?

A-What is the trend of atomic size in the periodic table and
why?
B-Determine the bonding type of given atoms (Fe-Fe, Ca-Cl, O-O,
H-H)
C-Calculate the density of Al, given its atomic radius and
crystal structure.
D-Calculate the atomic packing factor for FCC and BCC
structures
E-Compute the elongation due to thermal expansion of given
material.
F-Given the vacancy concentration, calculate
Evf
G-How can edge dislocation move? Draw illustrations.
H-Why are vacancies important to dislocation motions?
I-What is the mechanism...

Assume that you observe two firms operating in a Bertrand
oligopoly. The inverse demand function for the market is P = 200 –
2Q and each firm has the same cost function of C(Q) = 20Q. What is
the level of production for each firm, market price, and profit of
each firm? What would happen if both firms merge to form a single
monopoly with a cost function of C(Q) = 20Q?

Consider the experiment of rolling two standard (six-sided) dice
and taking their sum. Assume that each die lands on each of its
faces equally often. We consider the outcomes of this experiment to
be the ordered pairs of numbers on the dice, and the events of
interest to be the different sums.
Write out the generating function F(x) for the sums of the dice,
and show how it factors into the generating functions for the
individual die rolls.
Use F(x)...

1. For each of the following, explain whether the substances can
form a solution or not.
A. NH3 and NaCl CH4
B. KBr C4H10
C. CO2
2. Classify the following compounds as strong electrolytes, weak
electrolytes or non-electrolytes based on their dissolution
reactions in water.
A. C6H12O6(s)→C6H12O6(aq)
B. Na3PO4(s)→3 Na(aq)+PO43(aq)
C. AgCl(s)↔Ag+(aq)+Cl+(aq)
D. Mg(NO3)2(s)→Mg2+(aq)+2 NO3-(aq)
3. Write the balanced total ionic equation and net ionic
equation for the reaction that occurs when and (NH4)2CO3(aq) and
MgSO4(aq) are mixed.
4. What...

Answer all the following multiple choices with the right
answer.
Question 1
Which object(s) would you use to describe the shape of the
2p orbital?
Question 1 options:
a)
a circle
b)
a sphere
c)
a dumb-bell
d)
two perpendicular dumb-bells
e)
a doughnut
Question 2
Which situation must be true for two electrons to occupy the
same orbital?
Question 2 options:
a)
The electrons must have low energy.
b)
The electrons must have identical sets of quantum numbers.
c)...

1. The following successive ionization energies are for a
particular metal:
IE1 = 578 kJ
mol-1
IE2 = 1820 kJ
mol-1
IE3 = 2750 kJ
mol-1
IE4 = 11600 kJ
mol-1
Based on these ionization energies,
what charge ion would you expect to be the most stable? Briefly
explain.
Write shorthand electronic configurations for the atoms/ions
below:
Na
V3+
S2-
Which statement is true of an endothermic reactions? Briefly
explain your choice.
Weak bonds break and strong bonds form
Strong...

1) Express your answer as a molecular
formula.
a) Use the data below to calculate the heat of hydration of
lithium chloride.
b) Calculate the heat of hydration of sodium chloride.
Compound
Lattice Energy
(kJ/mol)
ΔHsoln(kJ/mol)
LiCl
-834
-37.0
NaCl
-769
+3.88
2)A certain reaction with an activation energy of 115 kJ/mol was
run at 485 K and again at 505 K . What is the ratio of f
at the higher temperature to f at the lower temperature?
Express...

A6-9. Suppose the aggregate production function for an economy
is given by Y* = (T+H)K1/2L1/2, where Y* is potential GDP, T is the
average level of technology, H is the average level of human
capital, K is the capital stock and L is the labour force. Assume
initially that both T and H equal 5, and that both K and L equal
64. Assume that the population grows at the same rate as any growth
in the labour force so...

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