Aa.91. ❤ Part AThe forensic technician at a crime scene has just prepared a luminol stock solution by adding 10.0 g of luminal into a total volume of 750 ml. of H₂OWhat is the molarity of the stock solution of lumino?Express your answer with the appropriate units.> View Available Hint(s)molarity of luminol solution 0753 MCorrectPart BPrvi AnBefore investigating the scene, the technician must dilute the huminel solution to a concentration of 5.00 x 10 Af The diluted solution is then placed in a spray bottle for application on the desired surfacesHow many moles of luminol are present in 2 00 L of the dated spray?Express your answer with the appropriate units.View Available Hint(s)moles of lumino-0100 mltPart CBrevia Anter✓ CorrectWhat volume of the stock solution Part A) would contain the number of moles present in the diuted solution (Part 5)Express your answer with the appropriate units>View Available Hint(s)JAvolume Value"UnitsO

Answered: Image /qna-images/answer/81c3e5bc-aed7-4c54-9e73-f6937fbb8163.jpg

❤ Part A The forensic technician at a crime scene has just prepared a luminol stock solution by adding 10.0 g of luminal into a total volume of 750 ml. of H₂O What is the molarity of the stock solution of lumino? Express your answer with the appropriate units. View Available Hint(s) molarity of luminol solution 0753 M Correct Part B Pravi Ant Before investigating the scene, the technician munt dilute the luminal solution to a concentration of 5.00 x 10 Af The dhted solution is then placed in a spray bottle for application on the desired eur How many moles of luminol are present in 2 00 L of the duted spray? Express your answer with the appropriate units. View Available Hint(s) moles of luminof- 0100 mol Nutrit Part C Previova Anmer ✓ Correct What volume of the stock solution Part A) would contain the number of moles present in the diuted solution Part Express your answer with the appropriate units >View Available Hint(s) A volume- Value Units

❤ Part A The forensic technician at a crime scene has just prepared a luminol stock solution by adding 10.0 g of luminal into a total volume of 750 ml. of H₂O What is the molarity of the stock solution of lumino? Express your answer with the appropriate units. View Available Hint(s) molarity of luminol solution 0753 M Correct Part B Pravi Ant Before investigating the scene, the technician munt dilute the luminal solution to a concentration of 5.00 x 10 Af The dhted solution is then placed in a spray bottle for application on the desired eur How many moles of luminol are present in 2 00 L of the duted spray? Express your answer with the appropriate units. View Available Hint(s) moles of luminof- 0100 mol Nutrit Part C Previova Anmer ✓ Correct What volume of the stock solution Part A) would contain the number of moles present in the diuted solution Part Express your answer with the appropriate units >View Available Hint(s) A volume- Value Units

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter6: Types Of Chemical Reactions And Solution Stoichiometry

Section: Chapter Questions

Problem 123CP: The units of parts per million (ppm) and parts per billion (ppb) are commonly used by environmental...

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Lead poisoning has been a hazard for centuries. Some scholars believe that the decline of the Roman Empire can be traced, in part, to high levels of lead in water from containers and pipes, and from wine that was stored in leadglazed containers. If we presume that the typical Roman water supply was saturated with lead carbonate, PbCO3 (Ksp = 7.4 1014), how much lead will a Roman ingest in a year if he or she drinks 1 L/day from the container?
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A throat spray is 1.40% by mass phenol, C6H5OH, in water. If the solution has a density of 0.9956 g/mL, calculate the molarity of the solution.
How do we define the mass percent composition of a solution? Give an example of a solution, and explain the relative amounts of solute and solvent present in the solution in terms of the mass percent composition.
Calcium carbonate, CaCO3, can be obtained in a very pure state. Standard solutions of calcium ion are usually prepared by dissolving calcium carbonate in acid. What mass of CaCO3 should be taken to prepare 500. mL of 0.0200 M calcium ion solution?
On Easter Sunday, April 3, 1983, nitric acid spilled from a tank car near downtown Denver, Colorado. The spill was neutralized with sodium carbonate: 2HNO3(aq)+Na2CO3(aq)2NaNO3(aq)+H2O(l)+CO2(g) a. Calculate H for this reaction. Approximately 2.0 104 gal nitric acid was spilled. Assume that the acid was an aqueous solution containing 70.0% HNO3 by mass with a density of 1.42 glcm3. What mass of sodium carbonate was required for complete neutralization of the spill, and what quantity of heat was evolved? (Hf for NaNO3(aq) = 467 kJ/mol) b. According to The Denver Post for April 4, 1983, authorities feared that dangerous air pollution might occur during the neutralization. Considering the magnitude of H, what was their major concern?
You wish to prepare 1 L of a 0.02-M potassium iodate solution. You require that the final concentration be within 1% of 0.02 M and that the concentration must be known accurately to the fourth decimal place. How would you prepare this solution? Specify the glassware you would use, the accuracy needed for the balance, and the ranges of acceptable masses of KIO3 that can be used.
When a solution is diluted by adding additional solvent, the concentration of solute changes hut the amount of solute present does not change. Explain. Suppose 250. mL of water is added to 125 mL of 0.55 1 M NaCl solution. Explain how you would calculate the concentration of the solution after dilution.
The units of parts per million (ppm) and parts per billion (ppb) are commonly used by environmental chemists. In general, 1 ppm means 1 part of solute for every 106 parts of solution. Mathematically, by mass: ppm=gsolutegsolution=mgsolutekgsolution In the case of very dilute aqueous solutions, a concentration of 1.0 ppm is equal to 1.0 g of solute per 1.0 mL, which equals 1.0 g solution. Parts per billion is defined in a similar fashion. Calculate the molarity of each of the following aqueous solutions. a. 5.0 ppb Hg in H2O b. 1.0 ppb CHCl3 in H2O c. 10.0 ppm As in H2O d. 0.10 ppm DDT (C14H9Cl5) in H2O