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The variation of the atmospheric pressure p with altitude h is predicted by the barometric formula to be p = p0 e^(-h/H) where p0 is the pressure at sea level and H=RT/Mg with M the average molar mass of air and T the average temperature. Obtain the barometric formula from te Boltzmann distribution. Recall that the potential energy of a particle at height h above the surface of the Earth is mgh. Convert the barometric formula from pressure to number density, N. Compare the relative number densities, N(h)/N(0), for 02 and H20 at h= 8.0 km, a typical cruising alttude for commercial aircraft
A solution is made by dissolving 0.100 mols of NaOCl in 100.0 mL of water. The Ka of hypochlorous acid (HClO) is 3.0*10^-8 at 25.0 degrees C.
Sodium fluoride is added to many municipal water supplies to reduce tooth decay. Calculate the pH of a 0.00304 M solution of NaF
An injection containing 10.0pg 10 5 B was injected into a patient suffering from a brain tumor. The patient was irradiated by a neutron gun at the site of the tumor.
What are the advantages and disadvantages of using methanol, ehtanol and water as a solvent for reactions
A student dispensed 20.00 mL of 2x10^-5 M blue #1 solution into a test tube. He then added 2.00 mL of NaCl solution and 2.00 mL of 2.50 % bleach solution.
A metal was heat up in hot water and then put into a Styrofoam cup of water at room temperature. the specific heat was calculated.
Calculate work (in kJ) when 422 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 445 K:
Use condensed structures to illustrate the 3 possible charged species and the one neurtral species that can exist in aqueous environments for the polar acidic acid of your choice. Indicate which conditions are present in each of the four drawings.
The density of air at 19 °C is 0.0020 g/ml at about atmospheric pressure. Although air is a mixture, we can take the average molecular weight of the molecules in air to be 27.37 amu. (a) What is the mass of air in the bottle? (b) By how much does ..
A two-component mixture of volatile liquids was separated by gas chromatography using a 15 meter capillary column. The separation was insufficient with this column to see resolution of both fractions.
What is the de Broglie wavelength (in nm) associated with a 2.50-g Ping Pong ball traveling 35mph?
Caculate the wavelength of light( in nanometers) that is absorbed when the electron in a He+ ion goes from the n=2
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