Using the equation from the calibration curve, determine the concentration of iron in your substance when your substance has an absorbance of 0.704. Report your answer to four decimal places. Do not use scientific notation (Canvas will not accept letters in a numerical answer) and do not include units in the answer.

Using the equation from the calibration curve, determine the concentration of iron in your substance when your substance has an absorbance of 0.704. Report your answer to four decimal places. Do not use scientific notation (Canvas will not accept letters in a numerical answer) and do not include units in the answer.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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(When answering this problem, report the answer with the appropriate number of significant figures. When entering units, use proper abbreviated units with proper capitalization.)A beverage drink mix sample is prepared by mixing a packet of beverage powder in a gallon (3.78 L) of water. A sample for analysis is prepared by diluting 10.00 mL of this solution in a 50.0 mL volumetric flask. When measured using a colorimeter, this diluted solution has an absorbance of (3.49x10^-1). The calibration curve for the experiment yielded a linear fit of y = 21655x+(1.7950x10^-2) and an R2 value of 0.9911. Determine the molar concentration of food dye in the analyzed sample. Hint: The answer is assumed to be reduced to the highest power possible.
A student plots the graph of absorbance vs. concentration for their sample. They end up with a line with the equation y = 0.015x + 0.006. If the student finds the absorbance of the caffeine solution is 0.117, what would be the concentration of caffeine in mg/ml?
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A student determines the concentration of an unknown sample using two different methods. Each method has three different trials; the average, standard deviation, and percent error produced by each method is listed below. Method 1 Average: 10.56 M NaOH Standard deviation: 1.35 M NaOH Percent error: 1.25% Method 2 Average: 10.92 M NaOH Standard deviation: 1.02 M NaOH Percent error: 3.45% Which method was more accurate? How can you tell?
G1
Try Again Your answer is incorrect. • KOH: Your answer is incorrect. KNO3: Your answer is incorrect. C2H5NH₂: Your answer is incorrect. HC2 H3 O₂: Your answer is incorrect. ● ● ● Some chemical compounds are listed in the first column of the table below. Each compound is soluble in water. Imagine that a few tenths of a mole of each compound is dissolved in a liter of water. The important chemical species that would be present in this solution are written in the second column of the table. Use the checkboxes to classify each compound. compound KOH ΚΝΟ, C,H,NH, HC,H,O, important species present when dissolved in water к, он, н,о K¹, NO₂, H₂O C₂H₂NH², OH, C₂H₂NH₂, H₂O + 2 3⁹ н₂о¹, C₂H₂O₂, HC₂H₂O₂, H₂O type of compound (check all that apply) strong weak strong weak acid acid base base ionic molecular X 0 5 0
A standard curve for absorbance vs. concentration has an equation of y = 2.0x. If an unknown compound has an absorbance of 0.856, what is its concentration? Units not required. Report your answer to the correct number of significant figures.
Chemical properties include (choose the best answer) Melting and boiling point Density Reactivity with other chemicals and molecules Solubility in various solvents
Question 4. In the course material you have been introduced to multiple charging for electrospray spectra. Each peak in the spectrum below can be used to provide a measure of the mass of this protein, you can work out the charge associated with each peak, and measures can be averaged to find the overall mass. Use simultaneous equations to find the charge associated with each peak in the spectra below, which will allow you to calculate the average mass of each species. Include an estimate of the error associated with this measure. 659.8 714.7 779.5 857,4 952.6 1071.5 BMW Sp
Each word should be moved from the answer bank toward the answer side.
The Structure of lonic Compounds/ Exit Ticket
Question 4. In the course material you have been introduced to multiple charging for electrospray spectra. Each peak in the spectrum below can be used to provide a measure of the mass of this protein, you can work out the charge associated with each peak, and measures can be averaged to find the overall mass. Use simultaneous equations to find the charge associated with each peak in the spectra below, which will allow you to calculate the average mass of each species. Include an estimate of the error associated with this measure. x105 659.8 714.7 779.5 857.4 952.6 1000 Page 3 of 3 1071.5 1100 1200 1300 +MS, 01-13min (779) myz