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What accelerating voltage would be needed to analyze for C6H6+ (MW = 78.11) using a magnetic sector mass spectrometer, if it required 1144V to detect CO2+ (MW = 44.00)?
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- The ion accelerating voltage in a particular quadrupole mass spectrometer is 5.00V.How long it will take a single charged cyclohexane ion to travel 15.0cm length of the rod assembly?Assume that the initial velocity of the ion in z direction is zeroWhat accelerating voltage would be needed to analyze for N2+ (MW = 28.01) using a magnetic sector mass spectrometer. The magnetic field was 0.352 Tesla and the radius of curvature was 12.2 cm (1 T = 1 Vs/m2)For a drift length of 200 cm, in a time-of-flight mass spectrometer, what is the difference in arrival time between singly charged ions of m/z 66 and m/z 43 when the accelerating voltage is 3800V?
- Calculate % transmittance if 85% of light was absorbed by an analyte sample in an UV-Vis spetrophotometric experimentThe molar absorptivity for Blue #1 dye is 1.30105 M‒1 ·cm‒1 at 629 nm. Calculate the expected absorbance of solution of Blue #1 with a concentration of 4.50×10–6M when measured at 629 nm in a 1.50 cm cell.What percent transmittance range and what absorbance range are considered to be the optimum working ranges for spectrochemical measurements?
- The g-factors of 1H and 13C are 5.6 and 1.4 respectively. For the same value of the magnetic field strength, if the 1H resonates at 600 MHz, the 13C would resonate at ______.The absorbances of solutions containing K2CrO4 in 0.05 M KOH were measured in a 1.0-cm cell of 375 nm. The following results were obtained: Calculate the linear equation of the calibration curve.Could a percent transmittance reading of 0.00 be used in calculations.? Yes or no and explain why.
- A solution containing 5.75 mg/100 mL of X (335 g/mol) has a transmittance of 41.6% in a 2.0 cm cell at 425 nm. Calculate the molar absorptivity of X at this wavelength. Note that: A = -log TAn absorbance calibration curve for Zn was fitted to equation A = 0.913×`Zn, ppm`. Flask 1: To the first flask, a 1.00 mL aliquot of the unknown Zn solution was diluted to 100.0 mL in a volumetric flask; the absorption intensity from this sample was measured to be A = 0.204. Flask 2: To a second flask, a 1.00 mL aliquot of the unknown Zn sample and a 1.00 mL aliquot of 10.00 ppm Zn solution were added and diluted to 100.0 mL in a volumetric flask; the absorbance of this sample was measured to be A = 0.294. Calculate the % spike recovery for the analysis and report to the nearest whole number. Hint: A=mC of the type y=mx, so C=A/m %Spike=100%((Cspike-Coriginal)/Cadded)) Cadded can be found from C1 V1=Cadded V2.A Dubosq colorimeter consists of a cell of fixed path length and a cell of variable path length. By adjusting the length of the latter until the transmission through the two cells is the same. the concentration of the second solution can be inferred from that of the former. Suppose that a plantdye of concentration 25 μg dm-3 is added to the fixed cell. the length of which is 1.55 em. Then a solution of the same dye. but of unknown concentration. is added to the second cel l. It is found that the same t ransmittance is obtained when the length of the second cel l is adjusted to 1.18 em. What is the concentration of the second solution?
