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A solution of a specific vitamin has ?max = 251nm and a concentration of 4.79x10^-7M. The absorbance of the solution at 251 nm is A = 0.175. What is the molar absorptivity of the vitamin at 251nm? (sample pathlength = 1.00cm)
Compare the natural chemistry that takes place in the environment with the chemistry that takes place due to man made factor like pollution.
Calculate the pH of a buffer made with 0.50M phosphoric acid and 0.75M sodium dihydrogenphosphate. Ka = 7.5 x 10-3.
Calculate how many moles of gas was in the bicycle tire when the total volume of gas collected is 5.60L{rm L} at a pressure of 765torr{rm torr} and a temperature of 25 °C^circ {rm C}.
Pure colored substances mostly exhibit a single peak (i.e. max) in the visible; therefore the simple rules of complementary colors apply. Mixtures are a little more complicated.
Assuming the delta S does not change with temperature, estimate the temperature at which iodine would sublime.
What is the difference b/t a chiral molecule and enantiomers?
Dry air at 1.0 atm is passed over a high voltage electric discharge (~15,000v) to convert 0.85% O2 to O3. The ozonized air is then euilibrated withwater at 25 degrees celcius in a vessel which contains
find the number of representative particles in each substance a)3.00 mol Sn b)0.400 mol KCI c)7.50 mol SO2 d)4.80x103 mol NaI
what is the total volume of air in a room which contains a total of 75 kG of oxygen?
Adenine is a purine base that is a component of several important molecules, including adenosine triphosphate (ATP), flavin adenine dinucleotide (FAD), DNA, and RNA. Draw adenine.
The following reactions take place in the reactor: 2 C2H6 + O2 ------> 2 C2H5OH 2 C2H5OH + O2 ------> 2 CH3CHO + 2 H2O 2 CH3CHO + O2 ------> 2 CH3COOH The oxygen conversion is 82.0%, and the concentration of the ethanol in the product stream is th..
A solution is made by mixing 12.0g of NaOH and 70.0mL of 0.200m HNO3. Calculate the concentration of OH- ion remaining in the solution.
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