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1. Two manufacturing plants need 1.0x104 kg of Al each week. One plant produces the Al from bauxite (Al2O3) and the other produces Al from recycled cans. Recovering Al via recycling consumes only 5% of the energy it takes to manufacture aluminum from bauxite. What is the dollar difference in energy costs for the two plants? For this problem you should only consider the Al energy costs. Assume each company pays $0.04 per kWhr and ?Hf for Al2O3 is -1676 kJ/mole. Finally, you will need this conversion factor: 1 watt-hr = 3600 J.
A. $163,928.B. $6,902.C. $6,557.D. $3,451.E. $3,279.
2. Over the course of a month, a typical family uses approximately 100 gallons of hot water per day. Assume that a month has 30 days, the price of electricity is $0.06 per kWhr, the heat capacity of water is 4.18 J oC-1 g-1, the water is heated from 20 to 70 oC, and that the water heater is 100% efficient. What is the monthly expense for heating water? (You will need the conversion factor for watt-hours given in problem #1 and you may need to look up other conversion factors.)
A. $9.50B. $22.06C. $39.61D. $158.33E. $661.83
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What volume (in milliliters) of 0.100 M NaOH should be added to a 0.120 L solution of 0.024 M glycine hydrochloride
describe an incident fire spill explosion etc you have experienced or research one on the internet professional journal
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An ice cube of mass 9.0g is added to a cup of coffee, whose temperature is 95C and which contains 130g of liquid. Assume the specific heat capacity of the coffee is the same as that of water.
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a vessel of 1.000 l is filled with 1.000 mole of h2 2.000 moles of n2 and 2.000 moles of ammonia. nbspconcentration of
Students at the University of North Texas and the University of Washington built a car propelled by compressed nitrogen gas. The gas was obtained by boiling liquid nitrogen stored in a 195.0 L tank.
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chemistry mixture of gases contains 0.200moleO2 o.4oomole N2 and 0.600mle H2 at 2.00 atm pressure what is the partial pressure of N2 in the mixture.
How many grams of nickel would be electroplated by passing a constant current of 7.2 A through a solution of NiSO4 for 90.0 min
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