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Calculate the Blood Alcohol Concentration of a suspect in a drunken driving murder if a sample had an absorbance of 0.578. Should he be charged with the impaired driving?
As technician in a large pharmaceutical research firm, you have 2.00 L of 1.00 M KH2PO4 solution and 1.50 L of 1.00MKH2PO4 solution, as well as a carboy of pure distilledH2O.
Determine the pH of blood if the pressure of CO2 drops to 30.0 mmHg if the normal physiological concentration of HCO3- is 24mM.
Compute the pH after addition of 50.0 mL of the titrant. Consider the titration of 50.0 mL of 0.20 M NH3 (Kb = 1.8 x 10-5) with 0.20 M HNO3.
Calculate the pH after addition of 30.0 mL of NaOH when a 30.0-mL volume of 0.50 M CH3COOH (Ka =1.8 x 10-5) was titrated with 0.50 M NaOH.
Determine the effect on the boiling point of a solution which is formed by a soluble nonvolatile substance? Determine the temperature of the vapor above these two boiling solutions? What is the eff
When the temperature is increased by 10 degrees the rate constant for a reaction is doubled. Which reaction has the greater activation energy and why?
Discuss how pure samples of each component could be obtained by the preparative gas chromatography from a mixture of two components even if the complete resolution of the peaks is not obtained.
What is the pH of the solution after 50.0 of base has been added? 100ml of .200 M HCl is titrated with .250 M NaOH. What is the pH of the solution at the equivalence point?
The ionization energy of Li is 520 kJ/mol. Calculate the minimum wave length of light needed to ionize one atom in the gaseous state and the ionization energy in Joules per atom in the gaseou
To indicate the stereochemistry about double bonds, place the groups attached to the double bonds in appropriate positions with 120 degree bond angles. Sketch the structure of(2S,3Z)-2-fluoro-3-hexe
The next day, the volume of air filled balloon has decreased by 4.7 %. Two identical balloons are filled to the same volume, one with air and one with helium. By what percent has the volume of the h
Determine the mass of the sample of silver (g). It takes 1.15 kJ of energy to heat a sample of pure silver from 12.0°C to 14.9°C.
If you obtained (-)-tartaric acid in your experiment, what salt would you obtain in the precipitate? Which isomer of a-phenylethylamine would you get from this in a resolution of a racemic mixture e
Determine the concentration of the diluted 1mlof Fe(NO3)3 solution? Transfer 4ml of the 0.0025M of Fe(NO3)3solution to a 100ml volumetric flask. Add distilled water til you fill up to 100ml mark
A sample which is having 25.5-g of an unknown metal is heated to 95.5°C and is placed in a insulated container containing 174 g of water at a temperature of 21.0°C. After the metal coo
The transition of v0 to v1 occurs at the frequency of 2885 cm. Why then is there no peak for this value? In our chemistry book there is a picture of the infrared absorbance spectra for HCL. Th
By what percent has the volume of the helium filled balloon decreased? Suppose that the air is 4/5nitrogen and 1/5 oxygen. Two identical balloons are filled to the same volume, one with air and one
Toluene and benzene form nearly ideal solutions and assume that Raoult's Law applies over the entire range of the composition. At 80oC, the vapor pressures of pure toluene and benzene are 0.387 bar a
Determine the final temperature of the mixture assuming no heat is lost to the surroundings, including the container if 50mL of 10*C water is added to 40mL of 65*C.
The car is then driven to the mountains and parked overnight. An automobile tire is inflated to a pressure of 3.05 atm on rather warm da when the temperature is 40.oC.
Suppose if you have a 0.1M solution of amino benzene, would you have to use the quadratic formula to calculate the weak acids concentration at the equilibrium?
A phenol, C6H5OH, which is having the 0.515 g dissolved in exactly the 125 mL of water. The resulting solution is titrated with 0.123 M NaOH.
As the CO2 sublimes the water temperature goes from 298K to 291K. A block of solid CO2 (5 g) is dropped into an insulated container containing 100 g of water.
Determine the concentration in moles/m^3 of oxygen in air (21%) oxygen) assuming it acts s an ideal gas at 20oC. Oxygen diffuses to the inside of insects through tiny tubes called tracheae which ave