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High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressures used in this procedure range from around 500 kilopascals (500,000 Pa) to about 60,000 kPa (60,000,000 Pa). It is often convenient to know the pressure in torr. If an HPLC procedure is running at a pressure of 2.04×10^8 Pa , what is its running pressure in torr?
Calculate pCd2 at each of the following points in the titration of 45.00 mL of 0.0070 M Cd2 with 0.0070 M EDTA in the presence of the auxiliary complexing agent NH3.
Using a solution of KMnO 4 has a percent transmittance of 27.3 percent when observed in a 1.15-cm cell at a wavelength of 525 nm. Compute the absorbance of this solution.
A mechanic in an automotive repair shop is exposed to the following carbon monoxide levels over an 8 hour shift.
what product would you expect to obtain from addition of Cl2 to 1,2-dimethylcyclohexene? Show the stereochemistry of the product.
Calculate the number of molecules in 37.0 mL of ethanol, CH3CH2OH. The density of ethanol is 0.789 g/mL.
Tarnish (silver sulfide) may be removed from a silver spoon by placing the spoon in contact with a metallic container holding a solution of baking soda.
How will the following changes alter the concentration of CO2(g) in the following reaction exothermic reaction? C6H12O6(s) + 6O2(g) 6CO2(g) + 6H2O(g)
How many nucleotides are needed to code for a polypeptide with eleven amino acids
How many grams of sodium azide are needed to fill a 30*30*25cm bag to a pressure of 1.30atm at 21.0C?2NaN3=3Na+2N2
percent iron in a sample that is 70.0% iron (II) ammonium sulfate hexahydrate, Fe(NH4)2(SO4)2 x6H2O.
What amount of H2 (in moles) is needed to inflate it to 1.0 atm in an ambient temperature of 25°C at sea level? mol. What mass can the balloon lift at sea level, where the density of air is 1.22 kg m-3? kg
An environmental chemist sampling industrial exhaust gases from a coal-burning plant collects a CO2-SO2-H2O mixture in a 21-L steel tank until the pressure reaches 850 torr at 45oC.
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