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Terephthalic acid, used in plastics manufacture, contains only C, H, and O. Combustion of 19.81 mg of terephthalic acid sample produces 41.98 mg CO2 and 6.45 mg H2O. What is the empirical formula
A common rule of thumb taught to engineers inthe recent past was that raising the temperature 10Cfor many reactions would double the reaction ratederive under what conditions this would be true.
When 7.20 grams of H2SO4 (l) at 22.0oC are poured into a 94.0 gram mixture of ice and water containing 6.15 grams of ice, a solution of sulfurinc acid (aq)forms at a temperature of 13.0 oC.
Ammonia NH3 with Kb = 1.8 x 10^05 is added to 100 mL of waterat room temperature and the vapor pressure of water above the soultion drops to P = 0.03 atm.
A sample of methane gas having a volume of 2.80 L at 25 degrees Celsius and 1.65 atm was mixed with a sample of oxygen gas having avolume of 35.0 L at 31 degrees Celsius and 1.25 atm. The mixture wa
The critical resolved shear stress for a metal is 25 MPa. Determine the minimum possible yield strength (in MPa) for a single crystal of this metal that is pulled in tension.
A 75mL mixture is prepared with 30mL of potassium iodide of concentration 0.180M, 15ml of Na2S203 of concentration 0.0036M and 30mL of (NH4)2S208 of concentration 0.180M.
Indicate how the partial pressure of hydrogen will change ifthe following stresses are applied to the equilibrium below: H2(g) +CO2(g)producecs
If 10.0 mL of .985 M NaOH adds to 25.0 mL of .990 M HY (unknownacid), the pH solution is 4.51. The concentration of HX and NaOHbefore mixing is .990 M and .985 M. What is the concentration of unreac
How many grams of water can be produced from the combination of 25 grams of hydrogen and 225 grams of oxygen? How much of which element will be left over?
How much sodium hydroxide in grams must be added to a sampleof seawater to completely precipitate the 83.2 mg of magnesiumions present?
Calculate the concentration of a benzoic acid solution (weakmonoprotic acid) if the equivalence point of a titration on 10.00mLof benzoic acid was reached after adding 22.61mL of 0.1062MNaOH.
A particular radioactive isotope has a half-life of 15.0 days. If you have 18.3 mg of the isotope at the beginning of the week, how many milligrams would you have 43 days later?
What safety precaution should you follow when working with theGas Chromatogram injection port? What will raising the temperature of the column do toretention times? How will it affect separation effic
The laser in most supermarket barcode scanners operates at awavelength of 632.8 nm. What is the energy of a single photonemitted by such a laser? What is the energy of one mole of these photons?
The shark tank at an aquarium houses 5 sharks that deplete theaquarium water of a total of 50.00 grams of oxygen per hour. Waterfrom the tank is diverted through a bubbler unit that oxygenatesthe wa
The equation, A = a*b*c becomes nonlinear at high concentrations of the absorbing substance. Suppose you prepare a solution with a very high absorbance that is suspect in not following the linear re
If you were monitring the titation by visible spectroscopy, what wavelength would you select for the data analysis? Why? How would you determine the end point of the tittaion based on the the recor
If you were monitring the titation by visivle spectroscopy, what wavelength would you select for the data analysis? Why? How would you determine the end point of the tittaion based on the the recore
If a 1.00-g piece of gold (density = 19.32 g/cm3) is hammered into a sheet measuring 8.0 x 5.0 ft, what is the average thickness of the sheet in meters?
A sample of methane gas having a volume of 2.80 L at 25 degreesCelsius and 1.65 atm was mixed with a sample of oxygen gas having avolume of 35.0 L at 31 degrees Celsius and 1.25 atm. The mixture was
Assuming that the concentration determined in the previous step corresponds to the inital amount of added NH3 (aq), what is the pH of the solution?
How many grams of lithium hydroxide are required to completely react 10.8 moles of selenous acid. write the conventional and net ionic equations and identify the type of reaction.