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What is the energy consumption per kilogram of zinc in an electrowinning operation with a current...
What is the energy consumption per kilogram of zinc in an electrowinning operation with a current density of 250 Amps/m2 assuming 95 % efficiency, n = 2, and a voltage drop of 3.0 volts across the cell? HINT: Current density is the current available divided by unit area of cathode. It includes BOTH sides of the immersed cathode.
Solutions
Amanda K answered 7 months agoRelated Solutions
2) The file ‘Energy’ contains the per capita energy consumption (in kilowatt-hours), for each of the...
2) The file ‘Energy’ contains the per capita energy consumption
(in kilowatt-hours), for each of the 50 states and the District of
Columbia during a recent year.
a) Compute the mean, variance, and standard deviation for the
population.
b) What proportion of these states has per capita energy
consumption within + or – 1 standard deviation of the mean, within
+ or – 2 standard deviations of the mean, and within + or – 3
standard deviations of the mean?...
Material A: 3 kilograms at R20 per kilogram Material B: 5 kilograms at R15 per kilogram...
Material A: 3 kilograms at R20 per kilogram
Material B: 5 kilograms at R15 per kilogram
Direct labour: 8 hours at R10 per hour
Fixed overheads: R120 000
Budgeted production: 9000 units
Actual results for February 2019 were as follows:
Material A: 32 500 kg at R22 per kilogram
Material B: 54 000 kg at R14 per kilogram
Direct labour: 88 000 hours at R12 per hour
Fixed overheads: R132 000
Production: 10 000 units
REQUIRED: Calculate the following:
1.1.1...
What is a kilocalorie? Select one: A. The amount of energy required to raise 1.0 Kilogram...
What is a kilocalorie?
Select one:
A. The amount of energy required to raise 1.0 Kilogram of water
1.0 degree Celsius
B. The amount of energy required to raise 100.0 ounces of water
1.0 degree Celsius
C. The amount of energy required to raise 1.0 gram of water 1.0
degree Celsius
D. The amount of energy required to raise 1.0 gram of water
100.0 degrees Fahrenheit
E. The amount of energy required to raise 1.0 Kilogram of water
100.0 degrees...
What are the challenges of the electricity energy sector in terms of electric energy consumption and...
What are the challenges of the electricity energy sector in
terms of electric energy consumption and the availability of
combustion sources for electricity generation?
2. The current price level in the U.S. is $14,000 per consumption bundle, and £10,000 per...
2. The current price level in the U.S. is $14,000 per
consumption bundle, and £10,000 per consumption bundle in the U.K..
The spot rate is $1.65/£. The annual inflation rate is expected to
be 2% in the U.S. and 5% in the U.K.
(1) Assume £ weakens against dollar by 4% in the next year.
Discuss with calculations (a) the impact on GBP’s purchasing power
in U.S. in the next year; (b) the impact on GBP’s purchasing power
in U.K....
State three environmental and three human consequences of current energy use and of conspicuous consumption as...
State three environmental and three human consequences of
current energy use and of conspicuous consumption as a business
model. (e.g., conflict over energy supplies: who gets what;
conflict over consumption: access to food or medicine)
The per capita energy consumption level (in kilowatt-hours) in a certain country for a recent year...
The per capita energy consumption level (in kilowatt-hours) in
a certain country for a recent year can be approximated by a
normal distribution, as shown in the figure.
Mean=2296
Standard deviation=581.8
(a) What consumption level represents the 5 th percentile?
(b) What consumption level represents the 17 th percentile?
(c) What consumption level represents the third quartile?
The per capita energy consumption level (in kilowatt-hours) in a certain country for a recent year...
The per capita energy consumption level (in kilowatt-hours) in
a certain country for a recent year can be approximated by a
normal distribution, as shown in the figure. (a) What consumption
level represents the 7th percentile? (b) What consumption level
represents the 21st percentile? (c) What consumption level
represents the third quartile? mean=2302 SD=584.5
The current listed price of zinc is $2.58 x 10^3 per ton. Assuming that each "silver"...
The current listed price of zinc is $2.58 x 10^3 per ton.
Assuming that each "silver" penny (1943-44) was made of pure zinc
had a volume of 0.360cm^3 determine the metal value of one roll (50
"silver" pennies.) Given the density of Zn is 7.14g/ml, 1 ton =
2000 lbs and 1 lb = 453.6 g
How much energy, in kiloJoules, would be required to raise the temperature of 1.00 kilogram of...
How much energy, in kiloJoules, would be required to raise the
temperature of 1.00 kilogram of liquid benzene
(C6H6) from 20.0 dC to its boling point of
80.1dC and then to completely vaporize the benzene at this same
temperature? The specific heat capacity of benzene is 1.74J
g-1 0C-1. The molar enthalpy of vaporization
of benzene is 1.929 kJ/mole.
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