Question

[1]- An alloy of silicon and iron (Si-Fe) has 0.25 wt% of Si. If the density and atomic weight are 2.33 ? ??3 and 28 ? ??? for silicon and 7.87 ? ??3 and 55.85 ? ??? for iron, calculate: a) Atomic percentage of silicon and iron. b) Density of iron in the alloy ( ?? ?3 ). c) Average atomic weight of the alloy ( ? ??? ). d) Number of moles of silicon and iron.

Answer #1

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1. 300 g FeCrNi alloy is 70 wt% Fe, 20 wt% Cr, and 10 wt%
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b. The mole fraction of Fe.

1. (a) Aluminum is alloyed with 10 atomic percent of the
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An arsenic (As)-doped silicon (Si) has a conductivity of 2.50 x
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1. Aluminum and iron are both important structural metals.
Suppose they are processed into the FCC and BCC structures. Of
these four possible structures (FCC Al, BCC Al, FCC Fe, BCC Fe),
which one has the a) lowest unit cell volume, and b) lowest
theoretical density? The radius of Al is 0.1431 nm and the radius
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and atomic weight of 50.99 g/mol. Determine...

Iron (Fe) crystallizes in a body-centered cubic structure with a
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cell?
b. Use drawings to show how the iron atoms are arranged on the
(100) and (110)
planes.
c. Determine diameter of iron atom
d. Determine the density of iron (g/cm3) by dividing
the total mass of iron atoms in...

Iron (Fe) crystallizes in a body-centered cubic structure with a
lattice constant of 0.287 nm:
a. Use drawing to show how the iron atoms are packed in the unit
cell. How many iron atoms are contained in each unit
cell?
b. Use drawings to show how the iron atoms are arranged on the
(100) and (110)
planes.
c. Determine diameter of iron atom
d. Determine the density of iron (g/cm3) by dividing
the total mass of iron atoms in...

A 10.69% (weight/weight) Fe(NO3)3
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Fe(NO3)3 in this solution.
b.) The mass in grams of Fe(NO3)3
contained in one liter of this solution.
c.) The molar concentration of NO3- in
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1. Briefly explain the difference between self-diffusion and
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--Given Values--
Atomic Radius (nm) = 0.116
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Engineering Notation.
...

1. Compute the resistivity of an intrinsic semiconductor at 300
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approximately 1x1010 cm-3.
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