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On a smoggy day in a certain city the ozone concentration was0.34 ppm by volume. Calculate the partial pressure (atm) of ozone and the number of ozone molecules per literof air if the temperature an
The amount of lactic acid,HC3H5O3, produced in a sample of muscle tissue was analyzed by reaction with hydroxide ion.Hydroxide ion was produced in the sample mixture by electrolysis.The cathode rea
The radioactive isotope 247 Bk undergoes a series of alpha-particleand beta particle productons, taking bk-247 through manytransformations to end up as 207pb. in the complete decay series,how many a
At some temperature,the reaction is PCL5(g) ®PCL3(g)+CL2(g). If 0.10mol of PCL5 are added to a 1-L flask, and 0.020 mol of PCL3 areyielded, what is the KC of this reaction when equilibrium is re
Calculate the change in internal energy (kJ) for the krypton sample.e. The heat capacity of ethylene, C2H4 is 43.7 mol^-1 K^-1.Explain why the heat capacity of krypton is smaller.
2-Bromo-3-methylbutane reacts with potassium iodide in methanol to yield 2-iodo-2-methylbutane. 2-Bromo-3-methylbutane reacts with potassium iodide in DMSO to yield 2-iodo-3-methylbutane.
2-bromobutane reacts with potassium hydroxide in ethanol at 50degrees Celsius to yield 2-butene, 1-butene, and 2-butanol. How can you change the reaction conditions to make the reaction yield more2-
A mixture consisting of 0.250 M N2 and 0.500 MH2 in a reaction vessel at certain temperature reactsand reaches equilibrium: N2(g) + 3H2 (g)<--> 2NH3(g). At equilibrium, the concen
A mixture containing only Al2O3 (FW101.96) and Fe2O3 (159.69) weighs 2.019 g.When heated under a stream of hydrogen, theAl2O3 is unchanged butFe2O3 is converted to metallic Fe plusH20(g).
The average energy output of a barrel of oil is 5.90 ×106 kJ/barrel.Calculate the number of barrels of oil needed to produce the sameenergy as the nuclear fission reaction of 1.30 mole of
A saturated solution of barium chloride at 30C contains 150 g water. How much additional barium chloride can be dissolved by heating this solution to 60C?
When 24.0 g of glucose (a nonelectrolyte) are dissolved in 500. gof water, the solution has a freezing point of -0.47°C.What is the molar mass of glucose? Kf of water is1.86°C/m.
Write the Lewis structures for the ozone molecule (O3). Show allresonance structures. Draw the Lewis structure for the bicarbonate ion (HCO3-). Show allresonance structure.
127.7g of NaCll completely dissolves (producing Na+ and Cl- ions) in 1.00kg of water at 2.0 degree celcius. the vapor pressure of pure water at this emperature is 23.8 torr. Determine the vapor pre
The radius of a xenon atom is 1.3x10-8 cm. A 100-mlflask is filled with Xe at a pressure of 1.1 atm and a temperatureof 265 K. Calculate the fraction of the volume that is occupied by Xe atoms. (Hin
What are some differences between a titration curve of a strong acid with strong base & a titration curve of a weak acid with strong base. Assume that the initial number of moles & initial
Boron consists of two isotopes... B w/ mass number 10 andatomic number 5 that has a mass of 10.0 amu....... and B w/ massnumber 11 and atomic number 5 that has a mass of 11.0 amu. If the atomic weig
Assume that you desire a minimum uncertainty in the positionofelectron of 10-10m. What is the maximum uncertainty that is acceptable in the momentum of the particle?
You are given a small bar of an unknown metal, X. You find the density of the metal to be 10.5 g/cm^3. An X-ray diffraction experiment measures the edge of the unit cell as 409pm.
You often work with salts of Fe3+, Pb2+, andAl3+ in the laboratory. You are given a solution containing all three of these ions, each at the concentration of0.10M. To separate these ions, you slowly
What states of this molecule may be reached by electricdipole transitions from the totally symmetrical ground state? What states of this molecular may be reached by electricdipole transition from an e
A solution contains 0.10M iodide ion, I-, and 0.10Mcarbonate ion, CO32-. If solidPb(NO3)2 is slowly added to the solution,which salt will precipitate first, PbI2 orPbCO3?
A balloon originally had volume of 0.439 L at 44 C and a pressureof 729 torr. To what temperature much the balloon be cooled to reduce its volume to 378 mL if the pressure remained constant?
Adding excess potassium hydroxide to an aluminum hydroxideprecipitate causes the precipitate to dissolve. Write an equationto describe the reaction.
A balloon that contains 0.500 L of helium at 25 C is cooled to 11C, at a constant pressure. What volume does the balloon now occupy?