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Give the following equation solve for M. Answer In scientific notation & 2 sig figs.
0.47 absorbance divided by 4713.6 mol/L = M?
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- Sample (μg) Absorbances (520 nm) Concentration 0.0 0.621 0 2.5 0.599 2.5 5.0 0.556 5 10.0 0.469 10 15.0 0.418 15 20.0 0.291 20 Plot a graph in which y axis represents for absorbance and x-axis represents for concentration From graph, y=mx + c Calculate the vitamin C concentrations of samples by the equation with consideration of dilution factors.The nickel level in a soil sample was determined using AAS. A 3.0 g sample was dissolved in acid and then diluted to a total volume of 100.0 mL. The absorbance of this solution determined at a wavelength of 232 nm, was found to be0.3. Several standard solutions were tested under the same conditions and a calibration curve shown below was obtained. Calculate the mass of nickel in mg.The equation of your standard curve of absorbance versus concentration (mM) is y = 1.245x + 0.0012. You put a solution of unknown concentration into the Spec20 and get an absorbance value of 0.227, which lies within the standards used to make the standard curve. What is the concentration of the unknown solution in mM?
- An unknown concentration of [FeSal]+ gave an absorbance reading of 0.301. Calculate the concentration of the solution, given that the slope of the standard curve was 1280 and the y intercept was -0.00821.The following data were obtained for 1.00 cm samples of a particular chemical. What is the concentration of a 1.00 cm sample with an absorbance of 0.60 according to the graph below? Round to 2 decimal places do not include units!Given the following standard curve of Absorbance vs Concentration (mM), what in the concentration of Aspirin if the absorbance is 0.822?
- A certain mixture of gasoline obtained from a petroleum refinery plant was found to contain only isooctane (C8H18; FM = 114.22), methyl tert-butyl ether (C5H12O; FM = 88.15), and tetraethyl lead (C8H20Pb; FM = 323.4), a gasoline preservative. Upon complete combustion of 0.4582 g sample, it was found out that the mass of the CO2 (FM = 44.01) absorbent increases by 1.0702 g, while the mass of residue PbO (FM = 223.2) was determined to be 0.0964 g. From this data, calculate the following: a. % (w/w) C8H18b. % (w/w) C5H12Oc. % (w/w) C8H20Pbd. % (w/w) Pb (FM = 207.2) Answer a to c onlyA certain mixture of gasoline obtained from a petroleum refinery plant was found to contain only isooctane (C8H18; FM = 114.22), methyl tert-butyl ether (C5H12O; FM = 88.15), and tetraethyl lead (C8H20Pb; FM = 323.4), a gasoline preservative. Upon complete combustion of 0.4582 g sample, it was found out that the mass of the CO2 (FM = 44.01) absorbent increases by 1.0702 g, while the mass of residue PbO (FM = 223.2) was determined to be 0.0964 g. From this data, calculate the following: a. % (w/w) C8H18b. % (w/w) C5H12Oc. % (w/w) C8H20Pbd. % (w/w) Pb (FM = 207.2) Answer Letter D onlyA certain mixture of gasoline obtained from a petroleum refinery plant was found to contain only isooctane (C8H18; FM=114.22), methyl tert-butyl ether (C5H12O); FM=88.15), and tetraethyl lead (C8H20Pb; FM=323.4), a gasoline preservative. Upon complete combustion of 0.4582 g sample, it was found out that the mass of the CO2 (FM = 44.01) absorbent increases by 1.0702 g, while the mass of residue PbO (FM = 223.2) was determined to be 0.0964 g. From this data, calculate the following: a. % (w/w) C8H18b. % (w/w) C5H12Oc. % (w/w) C8H20Pb
- Given that the percent transmittance of light through a sample was 27.6% what is the absorbance of the solution? Rounded to two sig figs.Mass of aspirin used is .090 g the absorbance for the final solution was .304 nm Slope is 1708 and y-intercept is -0.03397 what is the molarity of the final unknown solution and the molarity of the original solution made from aspirin in the 250.0 ml flaskFor the determination of Fe3 +, 25 mL of sample taken from sea water is diluted to 100 mL and a quantity of the obtained solution is taken and Fe3 + is determined by atomic absorption spectrophotometer. The absorbance values of the standard and sample solutions are below, and calculate the Fe3 + concentration in sea water in mg / L by drawing the relevant graph.Solution Absorbance1 mg / L Fe3 + 0.04095 mg / L Fe3 + 0.205110 mg / L Fe3 + 0.411615 mg / L Fe3 + 0.620820 mg / L Fe3 + 0.8222Sample Solution 0.5155