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Chlorofluorocarbons such as CCl3F and CCl2F2 have been linked to ozone depletion in Antarctica. As of 1994, these gases were found in quantities of 261 and 509 parts per trillion (1012) by volume. Compute the molar concentrations of these gases under conditions typical of (a) the mid-latitude troposphere (10°C and 1.0 atm) and (b) the Antarctic stratosphere (200 K and 0.050 atm).
What are the concentrations of OH- and H in a 0.00054 M solution of Ba(OH)2 at 25 °C? Assume complete dissociation.
By what factor does the reaction rate increase at 25oC when the catalyst is used. Assume that the Arrhenius pre-exponential factor, A, is the same for the catalyzed and uncatalyzed reactions.
At 20 degrees C the vapor pressure of pure methanol (CH3OH) is 89.0 torr and of pure water (H2O) is 17.5 torr. A solution of methanol and water has a total vapor pressure of 52.9 torr at 20 degrees C.
Calculate the enthalpy change in kilojoules when some KOH is added to 47.727 g of water and the temperature increases
What is the principal product when p-toluidine is treated with sodium nitrite and hydrochloric acid at 0-5 degrees Celcius
For cell with hydrogen and silver-silver-chloride electrodes, the cell potential was measured at 0.342V at 298K. Calculate the mean activity coefficient for HCL if the molality of the solution is 0.2 m.
Given equilibrium pressure, calculate Kp, When heated, ammonium carbonate decomposes as follows. NH4CO2NH2(s) f/r2NH3(g)+CO2(g)
Many gases are shipped in high-pressure containers. Consider a steel tank whose volume is 65.0 {\rm L} and which contains {\rm O_2} gas at a pressure of 16500 {\rm kPa} at 23^\circ C.
Calculate the wavelength of the light that is absorbed for the electron's transition from n = 5 to n = 6 in Be3+ ion. (ans in nm.)
A sample of bananas in water is found to have a [H3O1+] = 2.51 x 10-5M. What is the pH of the solution? Are bananas acidic (A), basic (B), or neutral (N)
What is the temperature of 0.600 mol of gas at a pressure of 1.5 atm and a volume of 12.1 L
Determine the concentration of a solution of Mg(NO3)2 given the precipitate formed is 2.97 g and there are 50mL of Mg(NO3)2 and 50 mL of NaOH. Please show all work for each step clearly
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