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To measure the concentration of benzene in a gasoline sample the internal standard toluene is added to the sample. While benzene and toluene are at the smeconcentration te gas chromatogram produces a peak height for benzene that is 3.74 times greater than that of toluene. For this analysis 7 ml of gasoline is mixed with 1.55 ml of solution containing 89 mg of toluene. While analyzed by gas chromatography the peak areas for benzene as well as toluene are 6382 and 4793 respectively. Find out how many milligrams of benzene are in the initial 7 ml of gasoline.
If someone can give a little insight on how to start this or what I would need to do to solve it.
Determine the pressure of the gases trapped in the closed end of a manometer apparatus if the water column which separates the closed end from the open end is 10.55 cm higher on the closed end than the open end, and if the barometric pressure at t..
Draw the structure of the peptide WRCFQ. Show the ionization state that would be the major form at pH 7. (Note: this question addresses your knowledge of the one or three letter codes for amino acids,
a graduated cylinder contains 155 ml of water. a 15.0 g piece of iron density 7.86 and a 20.0 g piece of lead are
The molar heat of fusion of water is 6.02 KJ/mol. Calculate the energy required to melt 16.6g of water.
How many electrons are transferred between the cation and anion to form the ionic bond in one formula unit of each compound? (1 electrons, 2 electrons, 3 electrons, 4 electrons)
When 35.0 g of an unknown nonelectrolyte is dissolved in 220.0 g of benzene, the solution boils at 83.2°C. Calculate the molecular weight of the unknown nonelectrolyte. The Kb for benzene = 2.53°C/m. The boiling point of pure benzene is 80.1°C.
How many milligrams of Ni would be plated on the cathode if a current of 0.20 A is drawn for 2.8 hrs? mg Ni b) What is [Cr3+] when [Ni2+] has dropped to 10-4 M? [Cr3+] = c) What is the cell potential at the conditions described in Part b E = V
A student has sample of HNO3 of 340 ml at 25 degrees celsius and add water of 110 ml at 95 degrees celsius then determine the final temperature of the mixture
a 10.0 g piece of metal at 100 degree celsius is transferred to a calorimeter containing 50.0 ml of water initially at
In 0.1592 M solution, a weak acid, HA, is 7.11% ionized. Calculate the ionization constant for the weak acid.
a 10ml sample of pure orange juice was diluted with 40ml of metaphosphoric acid solution. then 10ml of diluted juice
c6h14 is an organic solvent that has a density 0.6603 gcm 3 at the temperature of twenty degree celsius. when hexane
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