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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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When 33.5 mL of 0.580 M H2SO4 is added to 33.5 mL of 1.16 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate ?H of this reaction
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When exactly 0.500 mL of 0.0287 M Cu(N03)2 was added the signal increased to 37.9 units. Calculate the molar concentration of Cu^2. assuming that the signal was directly proportional to the analyte concentration.
What complementary functional group would need to be present in the neuraminidase active site for (a) hydrogen bonding and (b) ionic interactions to oseltamivir to be observed?
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Suppose a black-body chamber is constructed from 55.8 g (one mole) of iron and heated to 500 K. Classical theory and the observations of Dulong and Petit indicate that the total energy of vibration of iron atoms is 3RT per mole.
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The atmospheric oxidation of nitrogen monoxide was studied at 183C with initial partial pressure of 1.000 atm of NO and 1.000 atm of O2. At equilibrium, Po2= .50-6 atm. Calculate Kp. 2 NO(g) +02 ->
the temperature inside my refrigerator is about 40 celsius. if i place a balloon in my fridge that initially has a
Differentiate between the spectral features in the MS, CNMR, HNMR and IR of benzoic acid and methyl benzoate
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