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HPLC analysis of basic analytes is better to perform at low pH when they are fully ionized (2 pH units lower than analyte pKa). For the analyte with pka= 5.6 and 60/40 acetonitrile/water eluent composition what should be the pH of an aqueous portion of the mobile phase to ensure complete ionization
If the concentration of X is increased to 2.0 M and the concentration of Z to 3.0 M, how long should this reaction take?
Petroleum consumption in the US in 1990 supplied about 34.6E15 kJ of energy. Of this quantity, about 14.3E15 kJ was supplied by foreign sources.
unused lead nitrate to the container marked"sodium nitrate". What could the student do to get all the led ions out from the sodium nitrate?
How many moles of NH4NO2 would be required to form 25 grams of N2 in the following reaction
the appropriate number of significant figures. Use leading zeros if appropriate.
Find out what will be the half-lives if [NOBr]o = 0.054 M - The rate constant for the second order reaction Is 0.80 M-1s-1 at 10 degree celsius temperature
The activity coefficients of the Mg2+ and Cl- ions in this solution. The mean ionic activity coefficients of these ions.
Fundamentals of chemistry - The conditions under which gases behave most ideally and Under the Bronsted?Lowry definition a base
If you want to dope GaAs to make an n-type semiconductor with an element to replace Ga, which of the elements below would you pick
Aqueous solutions of sodium thiosulfate, Na2SO3, are used as an antidote to some snakebites. How many moles of sodium ions are found in 10.0 mL of a 0.15 M solution of Na2S2O3?
Describe how you will prepare a H2PO4-/HPO42- buffer using solid sodium dihydrogen phosphate and sodium hydrogen phosphate (pH 7.4, 500 mL 0.40M each).
Describe in detail the symptoms of this blood disorder. Explain the difference in the cells of this girl and a person who does not suffer from the disorder.
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