An alloy of magnesium and lead is 50% lead by weight. A) convert
this alloy to...
An alloy of magnesium and lead is 50% lead by weight. A) convert
this alloy to an equivalent atomic percentage. B) Convert this
alloy to an equivalent volume percentage
Discuss the likely form of a magnesium/lead alloy that doesnt
form an intermetallic when magnesium is present at low
concentration. Use any relevant information to support your
arguments.
A Magnesium Alloy bar 6 in. in diameter is being turned
on a lathe at a depth of cut d = 0.050 in. The lathe is equipped
with a 10-hp electric motor and has a mechanical efficiency of 80%.
The spindle speed is 500 rpm. Estimate the maximum feed that can be
used before the lathe begins to stall.
(0.45 W-s/mm^3 value of specific power for magnesium
alloy)
An alloy is composed of elements A (78%) and B (12%) by weight.
The density of the alloy is 1.95 g/cm3. The properties
of these elements are shown below:
Element
Gram Atomic Weight
σa (barns)
σs (barns)
A
22.1999
0.19
1.38
B
25.0055
0.21
2.44
Determine:
The atom densities for the two elements.
The atomic density for element A:
b. The absorption and scattering macroscopic cross sections for
thermal neutrons.
c. The mean free paths for absorption and...
A 0.250-g sample of a magnesium-aluminum alloy dissolves
completely in an excess of HCl(aq). When the liberated H2(g) is
collected over water at 29 ∘C and 752 torr, the volume is found to
be 303 mL . The vapor pressure of water at 29 ∘C is 30.0 torr.
How many moles of H2 can be produced
from x grams of Mg in magnesium-aluminum alloy? The
molar mass ofMg is 24.31 g/mol. Express your answer in terms of
x to four...
A 0.250-g sample of a magnesium-aluminum alloy dissolves
completely in an excess of HCl(aq). When the liberated H2(g) is
collected over water at 29 ∘C and 752 torr, the volume is found to
be 305 mL . The vapor pressure of water at 29 ∘C is 30.0 torr.
a. Taking into account the vapor pressure of water, how many
moles of hydrogen gas, n, are present in 305 mL at 752
torr and 29 ∘C? The value of the gas...
How much copper, in weight percent, is in an alloy consisting of
94.1 at.% Ag and 5.9 at.% copper? The atomic weights for Ag and Cu
are 107.87 g/mol and 63.55 g/mol, respectively.
Using the given lead-tin phase diagram for an alloy content of
80 wt % Sn and a temperature of 100 C (a) what is the primary phase
(b) what are the mass fractions of eutectic and primary phases?
Show tie line used and all calculations. Use standard lead-tin
phase diagram.
For an alloy that consists of 74.9 g copper, 108.0 g zinc, and
7.3 g lead, what are the concentrations of (a) Cu, (b) Zn, and (c)
Pb in weight percent? The atomic weights of Cu, Zn, and Pb are
63.54, 65.39, and 207.2 g/mol, respectively.
Traditional solder is a low melting point alloy of lead and tin.
(Some countries havemandated the future use of lead-free solders,
because of concerns relating to theenvironmental consequences of
lead use and disposal.) Using appropriate data gleaned from the
textbook, explain
(i) why lead has very limited solubility in solid tin
(hardly any lead will dissolve in tin at room temperature);
(ii) why tin is moderately soluble in solid lead (approximately
3.5% of the atoms in lead can be
replaced by...
An article reports that in a sample of 50 microdrills drilling a
low-carbon alloy steel, the average lifetime (expressed as the
number of holes drilled before failure) was 12.68 with a standard
deviation of 6.83. Based on this data, an engineer reported a
confidence interval of (11.35, 14.01) but neglected to specify the
level. What is the level of this confidence interval?
Give your final answer to the nearest percent.
The level is ____%.