An element has a face centered cubic unit cell with a length of 352.4 pm along an edge.The density of the element is 8.9 gcm-3.How many atoms are present in 100g of an element?
The element lead (Pb) crystallizes with a Face Centered Cubic
unit cell. The density of lead is 11.3 g/cm3. Use this information
to calculate the theoretical metallic radius of a lead atom in
picometers. 1 pm = 1×10−12 meters [Note: The theoretical value for
the metallic radius may be different from the experimentally
determined value. Simply Googling the value of atomic radius may
not yield the correct result]
Properties of matter
A metal crystallises in a face-centred cubic lattice.The edge of
the unit cell is 286pm,and the density of the crystal is
7.92gcm^-3.Calculate the atomic mass of the element?
Research an
historical example of inflation (greater than 10% in the US or
greater than 15% in any other country):
Summarize the time-frame, duration and rate of inflation
Analyze the root causes of the inflation
Describe interest rates during the inflationary period
Describe the major economic consequences of the inflation
Explain how they were able to control the inflation (if they
were)
Research an
historical example of inflation (greater than 10% in the US or
greater than 15% in any other country):
Summarize the time-frame, duration and rate of inflation
Analyze the root causes of the inflation
Describe interest rates during the inflationary period
Describe the major economic consequences of the inflation
Explain how they were able to control the inflation (if they
were)
Which of the followings give greater voltage than E◦cell in the
reaction of Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)? [E◦cell = 1.10 V]
Select one: A. [Zn2+]= 1.0x10-6 M, [Cu2+] = 1.5 x 10-5M B. [Zn2+]=
1.0x10-6 M, [Cu2+] = 1.0x10-6M C. [Zn2+]= 1.0x10-4 M, [Cu2+] =
1.0x10-6M D. [Zn2+]= 1.0 x10-6 M, [Cu2+] = 1.5 x 10-6M
28) Tosaythatturnipsarenecessitygoodsmeansthattheincome
elasticity
a) is definitely greater than 1.
b) is negative.
c) is greater than 0 but less than 1. d) is equal to 1.
e) is equal to 0.
29) The fact that the PPF usually bows away from the origin
implies that ...
a) as the production of any good increases, there is an increase
in the opportunity cost of producing it.
b) as the production of any good increases, there is a decrease
in the opportunity...
If np greater than or equals 5 and nq greater than or equals 5,
estimate Upper P left parenthesis at least 8 right parenthesis with
n equals 13 and p equals 0.6 by using the normal distribution as an
approximation to the binomial distribution; if np less than 5 or
nq less than 5, then state that the normal approximation is not
suitable. P(at least 8) =?
Gold has a face-centered cubic arrangement with a unit cell edge
length of 4.08 Å . How many moles of gold fit in a gold
nanoparticle sheet with a length of 57.3 nm , a width of 20.1 nm ,
and a thickness of 10.2 nm ?