For the data below, if a diluted (DF=100) water sample has an absorbance of 0.057, calculate the number of Cu atoms in a 100 mL sample. Answer using 3 significant figures. For Scientific Notation use this pattern example 6.02x10^23 Cu mg/L Absorbance 0 0.002 2 0.045 0.093 0.133 0.177 0.197 460 8 10
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- The following Absorbance vs concentration of nitrite graph is obtained for a set of data: Absorbance Vs Concentration y = 1.6628x+0.0373 R? = 0.9893 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0.2 0.4 0.6 0.8 1 Concentration of nitrite (mg/L) Determine the concentration of unknown solution for which the absorbance is determined as 0.69 A. More data is required В. 0.69 С. 0.65 D. 0.39 AbsorbanceFor the data below, Write the linear equation of the line (use 5 Decimal places and don't add "space") example y=1.23456x+4.32101 Cu mg/L Absorbance 0 0.002 0.045 0.093 0.133 0.177 0.197 24 4 6 8 10STANDARD SAMPLE PREPARATIONS FOR ABSORBANCE & CONCENTRATION DATA Concentration of stock nickel sulfate hexahydrate solution = .400 Molarity Sample Volume Absorbance Concentration (In Molarity) a 5 mL .179 10 mL .329 15 mL .588 20 mL .760 25 mL .939 Reference Blank = 0 Please show how to find Molarity, please show steps. Thank you and stay safe.
- A solution of FESCN2+ has a concentration of 1.00 x 10-2M and an absorbance of 0.755. What is the concentration of an FESCN2+ solution with an absorbance of 0.373? Enter your answer in scientific notation, with one decimal place, as follows: 2.3e-4 or 2.3E-4 Do not include units and note that 10 and x are NOT USED in this type of scientific notation.An unknown cobalt (II) chloride solution is measured to have an absorbance of 0.356. Calculate the molarity of the unknown cobalt (II) chloride solution using a spectrophotometer with a path length of 1.00 cm.The spectroscopic data given in the table was generated for two different concentrations of a solution. Concentration (M) Absorbance 0.0141 0.1073 0.1135 0.6005 What is the slope of the line formed by these points? m = What is the y-intercept? b= || What is the concentration of a solution with an absorbance of 0.377? concentration: M
- Construct a calibration curve based on the following data: Concentration Fe 0.100 0.500 2.00 4.00 7.00 (ppm) Absorbance 0.0122 0.0608 0.2322 0.455 0.5858 Use LINEST to find the slope and intercept and their uncertainties. Enter your answer as a number with no units to three significant figures. 0.085 0.037 b m 0.100 0.500 Sm Sb r2 0.958 0.037 SyComplete the table by entering the molarity of B2- for each standard solution. Show an illustrative calculation for tube ‘A’. Use the dilution formula and express each result to one more digit than allowed by applying the rules of significant figures. Standard Volume of stock B2- solution taken, mL Molarity of dilute B2 Construct a graph of Absorbance vs. molarity of B2- in Excel using the data in the preceding table. Make certain to title the graph and include axes labels with proper units. Absorbance is dimensionless (has no unit). Add a linear trendline to the graph but do not set the y-intercept to zero Solid M2B is added to 25 mL of water, the resulting mixture is continually stirred for 1 hour. At this point, it is assumed that equilibrium (eqn 3) has been established. The mixture is transferred to a test tube, and the test tube is centrifuged to assure that any residual solid M2B is fully settled out. A portion of the supernatant in the test tube is carefully…A solution of FESCN2+ has a concentration of 1.00 x 10-M and an absorbance of 0.755. What is the concentration of an FeSCN2+ solution with an absodbance of 0.491? Enter your answer in scientific notation, with one decimal place, as follows: 2.3e-4 or 2.3E-4 Do not include units and note that 10 and x are NOT USED in this type of scientific notation. Question 3 of 26>»
- Dissolution Distilled H20 Concentration 0.01 M HCI Concentration (mg/ml) Time Total amount A Total amount A (mg/ml) (mg) (mg) 5 0.16 0.1 10 0.24 0.18 15 0.35 0.25 20 0.48 0.34 25 0.58 0.4 30 0.67 0.5 1. Plot the given data on an ordinary paper and find the slope for each line then calculate the IDR constant for aspirin in the two dissolution media, water and HCI. NOTE: Slope of the calibration curve = 1.0 (mg/ml and saturation solubility of salicylic acid is equal to 2.0 gm/L.0.13 absorbance/4713.6 L/mol = ? Answer In scientific notation please.The spectroscopic data in the table is generated with five solutions of known concentration. Concentration (M) 0.0133 m= 0.0266 0.0532 0.106 0.213 Absorbance 0.1271 What is the intercept of the linear regression line? 0.08531 0.5388 1.069 Use a spreadsheet program, such as Microsoft Excel, to graph the data points and determine the equation of the best-fit line. 1.954 What is the slope of the linear regression line formed by these points? M-1