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Compute an estimate of how long it would take for a gaseous air-borne cold virus of molar mass 100 kg/mol to travel a distance of 1.0 m by diffusion in still, 25oC air at 1.0 atm. Presume the bulk density of the virus is the same as that of water.
A ruby laser produces radiation of wavelength 633 nm in pulses with a duration of 1.00*10^-9s. If the laser produces 0.475 J of energy per pulse, how many photons are produced in each pulse?
Propylamine, also known as n-propylamine, is an amine with the chemical formula C3H9N. Propylamine is a weak base with its Kb equaling 4.7 * 10^(-4). Calculate the pH of 0.59 M solution of propylamine hydrochloride.
Compute the mole fraction of CO in the mixture. b) The mixture is heated and the CO starts to react with O2 to give CO2 according to the equation: CO(g)+1/2O2->CO2. At equilibrium, 3.0 mol of CO2 is present. Using an ICE table, determine the mole fra..
Two isotopic compounds are produced in the synthesis of a new therapeutic drug which must be separated by repeated chromatography cycles. In each cycle, the solution containing both compounds must pass through a chromatography column
3h2 n2 ----- 2nh3the kp for the reaction is 4.3x10-4 at 648k. determine the equilibrium partial pressure of nh3 in a
Carbon-dating evaluates the ratio of radioactive carbon-14 to stable carbon-12. Given the amount of carbon-12 contained a measured sample cut from the document, there would have been about 1.3 × 10-12 grams of carbon-14 in the sample when the parc..
a 42 gram block of an unknown metal at 86.0oc was dropped into an insulated flask containing approximately 50.0 grams
The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in the solution?
Gas was obtained by boiling liquid nitrogen stored in a 175.0 L tank. What volume ofN2 is released at 0.940 atm of pressure and 25 C from a tank full of liquid N2(d=0.808g/mol)
a student purified a 500-mg sample of phthalic acid by recrystallization from water. the published solubility of
If the minimum amount of solvent is recrystallized at 12.8 g by heating it to 70 C and sampling it in an ice water bath what is the minimum percent recovery of the recrystallized material?
Given 25.00 mL of the unknown weak acid, 12 mL of NaOH solution was added to the unknown. Leave the unknown weak acid and NaOH concentrations as variables. The pH of the solution is 4.13. What is pKa for the acid
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