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Have a concentrated stock solution of HCl (2 M). If want to make 100 ml of 0.5 M HCl define how much of the original stock solution do needed?
A flask filled with ethanol at 20.0 degree C has a total mass of 61.742 g. The flask is emptied and some ball bearings with a mass of 21.784 g are added to the flask.
The kinetics of double-stranded formation for a dodecamer containing two G.T base pairs was measured by temperature-jump kinetics. The reaction is
An unknown liquid boiling around 185 +/- 5 degrees C in 5% HCl and in a pH 5.5 buffer but is insoluble in water. Shaking the unknown with p-touluenesulfonyl chloride in aqueous NaOH produces a white precipitate that doesn't dissolve in dilute HCl...
The first-order rate constant for the decomposition of a certain hormone in water at 25oC is 0.125 yr-1. How long will it take for the concentration of the solution to drop from 0.0100 M to 0.0075 M at this temperature
a basketball is inflated to a pressure of 1.90 atm in a 24.0degc garage. what is the pressure of the basketball outside
calculate the individual masses of C, H, and O in the 0.7549 g sample.
if 3.80 mL of vinegar needs 45.0 mL of 0.140 M NaOH to reach equivalence point in a titration, how many grams of acetic acid are in a 1.60 qt sample of this vinegar?
Enough of a monoprotic acid is dissolved in water to produce a 0.0177 M solution. The pH of the resulting solution is 2.65. Calculate the Ka for the acid.
alkali halides commonly have either the sodium chloride structureor the cesium chloride structure. the molar mass of
The reaction of t-butyl bromide (CH3)3CBr with water to make t-butyl alcohol (CH3)3COH proceeds according to the following steps: write the rate law for the reaction
if a room has a volume of 127m3 then calculate its volume a in km3? b in dm3? c in cm3?a suspension of an infant
A buffer system is created by first neutralizing the supernatant solution containing Pb2+, Fe3+, Ca2+, Cu2+, ad K+ ions with 6M NH3 solution, and then adding an equal additional volume of 6M NH3 solution.
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