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Fermentation of starch and sugar crops yields about 10% molar volumes of ethanol in water. Distillation of this mixture to remove the water and produce pure ethanol is an expensive and energy intensive process. To reduce fuel costs, some researchers have proposed partial distillation to a 50% mixture of ethanol and water, a mixture that could be used to power a high temperature fuel cell. Calculate the enthalpy change in oxidizing this mixture in air if the reactants are at 298 K and the products are at 1200 K.
What is the minimum number of microwave photons with a wavelength of 3.07 mm that will have to be absorbed by a 126.00 gram sample of water to heat it from 25°C to 100°C?
What is the limiting reagent in the reduction of C10H16O with NaBH4 assuming you initiate it with.1 g of sodium borohydride and .1 g of camphor?
A source of energy releases 3000 calories. This changed the temperature of a mass of water from 25 C to 55 C. What is the mass of the water?
Copper dissolved in nitric acid, producing copper (II) nitrate. After reaction with sodium hydroxide and heating, copper nitrate changed to coper (II) oxide. Calculate the percent yield of this process if 1.075 g of copper produced 1.075 g of copp..
Quinine (C20H24N2O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug.
Determine the molecular weight of a compound given the gas phase data: mass of 11.8 g, temperature of 39.1 C, pressure of 630 torr, volume of 1.31 L.
Calculate the mass of propylene glycol that must be added to 0.330 of water to reduce the vapor pressure by 2.88 torr at 40°C (Pressure of H2O is 55.3 torr at 40°C ).
A reagent bottle is labeled 0.388M Na2SO4. assuming no volume change, how many grams of Na2SO4 (MM=142.05g/mol) needs to be added to 1.50L solution to obtain 0.750M solution of Na2SO4?
Determine the ΔH solution for this compound If the heat of solvation for this compound = -30.8 kJ/mol , crystal lattice energy = -62.2 kJ/mol.
In an oxidation-reduction reaction, it required 25.6 ml of a 0.65 M potassium permanganate solution to reach the equivalence point with 15.0 mL of an iron(II) sulfate solution.
Suppose that you have a 2.0 L sample of hydrogen at 1.00 atm and 59°C. If you heat the sample to 84°C and it expands to a volume of 3.7 L, what will the final pressure be?
Fe3O4 reacts with CO according to the reaction Fe3O4(s) + 4CO(g) --> 4CO2(g) + 3Fe(s). If 201 grams of Fe3O4 is reacted with excess CO, what mass of CO2 will be produced?
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