Which of the following methods would provide a 2.5 M aqueous solution of Ba Cl2? a) Add 2.5 liters of BaCl2 to a container and dilute until there is a mole of solution b) Add 2.5 moles of BaCl2 to a container and dilute with water to a volume of 1.0 liters c) Add 2.5 moles of BaCl2 to a container and dilute with water to a volume of 2.5 liters d) Add 1.0 moles of BaCl2 to a container and dilute with water to a volume of 2.5 liters
In: Chemistry
y'=y-x^2 ; y(1)= -4
Write a MATLAB program that makes two plots of the solution to the equation using the following values. Suggest you use nested loops instead of two different loops. Be sure to label your plots.
a. x0 = 1.0, step size h = .2, number of steps n = 20.
b. x0 = 1.0, step size h = .05, number of steps n = 80.
In: Mechanical Engineering
A student makes a voltaic cell with a Ag electrode in 1.0 M AgNO3 solution and a Pb electrode in a 1.0 M Pb(NO3)2 solution.
a. Identify the cathode and write the half reaction.
b. Identify the anode and write the half reaction.
c. Write the overall reaction and calculate Eocell for the voltaic cell.
d. What is Ecell if the concentrations of the ions in solution are [Ag+] = 0.045 M and [Pb2+] = 0.36 M? Temperature = 298.15 K.
In: Chemistry
To 1.0 L of water, 2.8 × 10–6 mol of Pb(NO3)2, 6.6 × 10–5 mol of K2CrO4, and 1.0 mol of NaCl are added. What will happen?
| Salt | Ksp |
| PbCrO4 | 1.8 × 10–14 |
| PbCl2 | 1.6 × 10–5 |
A.No precipitate will form.
B.A precipitate of PbCrO4 will form.
C.Both a precipitate of PbCl2 and a precipitate of PbCrO4 will form.
D.A precipitate of PbCl2 will form.
E.A precipitate of KCl will form.
In: Chemistry
Your landscape design scenario is a new landscape that utilizes plant species with very low evapotranspiration value. The microclimate is high with an unprotected environment in a windy area. The plant density is moderate since it is a new landscape. What is the Landscape Coefficient for this landscape using the numbers provided in the table below
HIGH MODERATE LOW VERY LOW
SPECIES FACTOR .8 .5 .2 .1
DENSITY 1.2 1.0 .7
MICROCLIMATE 1.3 1.0 .6
In: Biology
Using the equation: 2 NO + O2 à 2 NO2
Determine the limiting reactant if given 1.0 mol NO and 1.0 mol O2
Determine the limiting reactant if given 4.2 mol NO and 2.0 mol O2
Determine the limiting reactant if given 10.0 grams NO and 10.0 grams O2
Identify the species that is oxidized and the species that is reduced in each of the reactions below:
Fe + Cu2+ à Fe2+ + Cu
Mg + Fe2+ à Mg2+ + Fe
In: Chemistry
A line of charge 2.0 m long has 50.0 nC of charge uniformly distributed along it. (a) Calculate the electric field 0.25 m above the center of the line. (b) If the field point were moved from 0.25 m to 1.0 m, by what factor does the field increase/decrease? (c) How does this compare with moving the field point from 0.25 m to 1.0 m away from a point charge?
In: Physics
A tangent section of highway has a -1.0% grade and
ends at station 0+145 and
elevation 26 m. It must be connected to another section of highway
that has a -1.0% grade and that
begins at station 1 + 350 and elevation 40 m. The connecting
alignment should consist of a sag
curve, constant grade section, and crest curve, and be designed for
a speed of 80 km/h. What is the
lowest grade possible for the constant grade section that will
complete the alignment?
In: Civil Engineering
The number of defects after a hotel room cleaning (sheets not straight, smears on mirror, missed debris on carpet, fresh towels not folded, etc.) should be measured using what type of process control chart?
|
A) x-bar chart |
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B) R-chart |
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C) p-chart |
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D) c-chart |
In: Other
Modern Visionary Hotel Chain has $1,000 face value bonds outstanding. These bonds pay interest semiannually, mature in six years, and have a 5 percent coupon. The annual yield to maturity is 12.6%. What is the bonds current price? (round to the nearest penny)
N:
I:
PV:
PMT:
FV:
In: Finance