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Problem 1: Air is passed above an Arnold cell containing liquid toluene. The temperature is 298 K and the total system pressure of the gas headspace is a constant 1.01 * 104 Pa. the cell has a cross sectional area of 0.8 cm2, a height of 13 cm, and a liquid depth of 3cm. Using diffusivity data given in Appendix J of W3R, plot the molar flux (mol m2 s-1) and the liquid toluene level (cm) vs. time (hr-1). How long does it take for the toluene to be depleted? At 298 K, the vapor pressure and the specific gravity of toluene are 28.4 mm Hg and 0.866, respectively.
How many grams of TiCl4 are needed for complete reaction with 155L if H2 at 430 degrees C and 780mmHg pressure? How any liters of HCl gas at STP will result from the reaction described in part (a)?
Urease enhances the rate of urea hydrolysis at pH 8, 20 degrees C, by a factor of 1E14. If a given quantity of urease hydrolyzes a given quantity of urea in 6.0 minutes at 20 degrees C and pH 8
a copper refinery produces a copper ingot weighing 75 kg. the density of the copper is 8.94 gcm3. if the copper is
What mass of salt (NaCl) should you add to 1.96L of water in an ice cream maker to make a solution that freezes at -10.2C. Assume complete dissociation of the NaCl and density of 1.00 g/mL for water.
Butanoic acid, CH3CH2CH2 COOH, is a weak acid. Which of the following would be the pH of a 0.01 M butanoic acid? the answer is > 2.0, but how would I figure that out
A 1.80-g sample of a large biomolecule was dissolved in 21.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C
What is the rate constant for a) a zero order reaction, b) a 1st order reaction, c) a 2nd order reaction, and d) a 1/2 order reaction? All concentrations are expressed in molarity
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?
For the above current at 5.45 V, how much electrical energy (in kw-hr) is consumed in the production of 1 kg of aluminum. (A kW-hr is 3.6 x106 J.)
A zero-order reaction has a constant rate of 1.60×10-4 . If after 35.0 seconds the concentration has dropped to 2.50×10-2 , what was the initial concentration?
Explain Burning in pure oxygen, the hydrocarbon gas butane, C4H10, produces carbon dioxide and water. If 0.30 moles of butane are burned, define how many moles of carbon dioxide and water are formed
A balloon originally has a volume of 4.39L at 44 C and a pressure of.959atm. The balloon must be cooled to what temperature in order to reduce its volume to 3.78 L?
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