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In the set-up for microscale distillation, the water condenser is positioned above the Hickmann distillation column where the product is being collected. In a simple or fractional microscale distillation, the water condenser is between the distillation column and collecting flask. Why does this different microscale arrangement work? Visualize whats happening at the molecular level and explain how your products wind up in the Hickman's collection well. What would happen if you placed the Hickman above the water condenser?
The mass of an electron is 9.11 * 10^{-31} kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31*10^{-10}m, how fast is the electron moving relative to the speed of light?
If a reaction mixture contains only N2O and NO2 at partial pressures of 1.0 atm each, the reaction will be spontaneous until some NO forms in the mixture.
find the number of moles of water that can be formed if you have 218 moles of hydrogen gas and 104 moles of oxygen gas
A 41 kg person drinks 280. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 18% of the energy in milk is converted to mechanical work,
a 10.00ml sample of drain cleaner, which contains NaOH, was titrated with 25.00ml of 1.00M HCl. calculate the number of moles of HCl added.
If this energy were used to vaporize water at 100 degrees C, how much water in liters could be vaporized? (Assume that the density of water is 1.0 g/mL.)
If the surface area of a human body is 16,100 square centimeters, what is the total weight of the atmosphere on a human body
A system conducts 238 cal of heat to the surroundings while delivering 331 cal of work. what is the change in internal energy of the system (in cal).
The piece of iron with a mass 102.9g was submerged in a graduated cylinder filled with water. The initial level of water was 20.0 ml. The density of iron is 7.86 g/ml.
Calculate the ratio of dihydrogen phosphate to hydrogen phosphate in the blood at pH 7.4. The Ka = 6.3 x 10 -8 5. For a weak acid with a pKa of 6.0 calculate the ratio of conjugate base to acid at a pH of 5.0.
Consider the zinc atoms of ZnSe. With what pairs of atoms could the Zn be replaced to make another isoelectronic solid
Determine the standard reaction enthalpy for the partial combustion of methane to carbon monoxide according to the following reaction:
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