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manganese was determined in samples of geological interest via x-ray fluorescence using barium as an internal standard
the following questions concern the relative concentration uncertainty in spectrophotometrya if the relative
a compound x is to be determined by uv-visible spectrophotometry a calibration curve is constructed from standard
a solution of i2 in ethanol had a density of 0794 gcm3 a 150-cm layer was found to transmit 273 of the radiation from a
for mo ka radiation 0711 the mass absorption coefficients for k l h and o arc 16739200 and 150 cm2g respectivelya
the mass absorption coefficient for ni measured with the cu ka line is 492 cm2g calculate the thickness of a nickel
a 250-ml aliquot of a solution that contains 79 ppm ironiii is treated with an appropriate excess of kscn to form the
the equilibrium constant for the reactionis 42 x 1014 the molar absorptivities for the two principal species in a
describe the differences between the following and list any particular advantages possessed by one over the othera
a portable photometer with a linear response to radiation registered 638 mua with the solvent in the light path the
the following data were taken from a diode-array spectrophotometer in an experiment to measure the spectrum of the
describe the origin of shot noise in a spectrophotometer low does the relative uncertainty vary with concentration if
zincii and the ligand l form a 1 1 complex that absorbs strongly at 600 nm as long as the molar concentration of l
a solution containing the complex formed between biiii and thiourea has a molar absorptivity of932 x 103 l mol-1 cm-1
a solution containing 524 mg100 ml of a 335 gmol has a transmittance of 552 in a 150-cm cell at 425 nm calculate the
a solution containing 623 ppm kmno4 had a transmittance of 0195 in a 100-cm cell at 520 nm calculate the molar
the enzyme monoamine oxidase catalyzes the oxidation of amines to aldehydes for tryptamine km for the enzyme is 40 x
the acid-base indicator hln undergoes the following reaction in dilute aqueous solutionthe following absorbance data
the chelate cua22- exhibits maximum absorption at 480 nm when the chelating reagent is present i at least a tenfold
palladium ii forms an intensely colored complex at ph 35 with arsenazo iii at 660 nm33 a meteorite was pulverized in a
the accompanying absorption data were recorded at 390 nm in 100-cm cells for a continuous-variation study of the
the accompanying data were obtained in a slope-ratio investigation of the complex formed between ni2and
the sodium salt of 2-quinizarinsulfonic acid naq forms a complex with alamp39 that absorbs radiation strongly at 560
the method developed in problem 14-11 was used for the routine determination of iron in 250-ml aliquots of groundwater
a standard solution was put through appropriate dilutions to give the concentrations of iron shown below the