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Taking the systematic approach, write the pertinent reaction equations, mass balance, charge balance, and other possible equations. Derive an equation for the calculation of [H+] in the 0.1M HF solu
A 1.00-gram sample of a biological material was dissolved in enough water to give 100.0 mL of solution. The osmotic pressure of the solution was 2.80 torr at 25oC. Calculate the molarity and the app
A solution of 50 mL of 0.3 M R-enantiomer is mixed with 10 mL of 0.5 M S-enantiomer. The observed rotation is + 7.6 degrees. Calculate the enantiomeric excess of the solution, the specific rotation
A(n) 0.65 mole quantity of O2 originally at 85 degrees celcius is cooled such that is now occupies 4.0 L at 20 degrees celcius. What is the final pressure exerted by the gas?
A 4.0 L flask containing N2 at 15 atm is connected to a 4.0 L flast containing H2 at 7.0 atm and the gases are allowed to mix. What is the mole fraction of N2.
Silver ion forms a complex ion with cyanide,Ag(CN)2-. Its formation constant equals 5.3 x1018. What is the value of the instability constant?
What value of pH permits the selective precipitation of the sulfide of just one of the two metal ions in a solution that is0.020 molar in Pb2+ and 0.020 molar inFe2+?
Suppose we vaporize a mole of liquid water at 25C and another moleof water at 100C. Assuming that the enthalpy of vaporization ofwater does not change much between 25C to 100C, which process involve
One of the many remarkable enzymes in the human body is carbonic anhydrase, which catalyzes the interconversion of carbonic acid with carbon dioxide and water. If it were not for this enzyme, the bo
Calculate the average induced voltage between the tips of the wings of a Boeing 747 flying at 880 km/hr above East Lansing. The downward component of the earth's magnetic field at this place is 0.7&
Suppose that when two liquids, A and B, are mixed, the totalvolume after mixing is smaller than the sum of the volumes of the two liquids before mixing. What does this imply about the forces acting
A student investigating the specific heat of an unknown metalused a styrofoam cup as a calorimeter. She measured the mass of thewater, 50.2025g; the mass of metal, 56.0371g; the initialtemperature o
Calculate the half-life of the decomposition of azomethane.(According to the discussion in the text, the decomposition of azomethane is first order and the rate constantis 2.6 x 10-3 s-1.)
A sample of carbon monoxide gas was collected in a 2.0 L flask by displacing water at 28 degrees C and 810mmHg. Calculate the number of CO molecules in the flask. The vapor pressure of w
When .7521 grams of benzoic acid was burned in a calorimeter containing 1000 grams of water, a temperature rise of 3.60 degrees celcius was observed.
How many liters of chlorine gas at 200 degrees celcius and .500 atm can be produced by the reaction of 12 grams on MnO2 with HCl as follows? MnO2+4HCl reacts to give MnCl2+2H2O+Cl2
The heat of combustion for a sample coal is 23.0 Kj/g. What quantity of coal (in grams) must be burned to heat 500g of water from 20C to 95C. The specific heat capacity of water is 4.184 JC-1g-1. Is
How many signals would you expect in the H NMR spectrum of caffiene? give details regarding the unique chemical environments for each signal.
Calculate the pH of the solution that forms during a titration when 26.00 mL of 0.10 M NaOH has been added to 25.00 mL of 0.10 MHC2H3O2.
Mary needs 56 g of gallium nitride, which can be made by sonochemical techniques with an 85 percent yield. How much gallium metal must she use to get the desired amount of the product.
The radical chlorination of trans - 1,3 dimethylcyclobutane yields how many products? (ignore enantiomers). Which product is produced in the highest yield?
What will be the percent composition by mass of a solution made by dissolving 15.0 grams of barium nitrate Ba(NO3)2 and 45.0 grams of water?
A 250mL sample of .0328 Moles of HCL is partially neutralized bythe addition of 100mL of .0245 Moles of NaOH. What is the concentration of hydrochloric acid in the solution.
What are the differences between constitutional isomers, stereoisomers, and diastereomers and how can you determine which one is which?
10ml of gaseous hydrocarbon is mixed with exess of oxygen and burnt and cooled to the laboratary temp. the reduction in volume was found to be 30ml, the gas is then passed to custic potash solution.