The forensic technician at a crime scene has just prepared a luminol stock solution by adding 15.0 g of luminol into a total volume of 75.0 mL of H3O. What is the molarity of the stock solution of luminol? Express your answer with the appropriate units. > View Available Hint(s) ? molarity of luminol solution = Value Units Submit Part B Before investigating the scene, the technician must dilute the luminol solution to a concentration of 6.00×10-2 M . The diluted solution is then placed in a spray bottle for application on the desired surfaces. How many moles of luminol are present in 2.00 L of the diluted spray? Express your answer with the appropriate units. View Availahle Hintie)

The forensic technician at a crime scene has just prepared a luminol stock solution by adding 15.0 g of luminol into a total volume of 75.0 mL of H3O. What is the molarity of the stock solution of luminol? Express your answer with the appropriate units. > View Available Hint(s) ? molarity of luminol solution = Value Units Submit Part B Before investigating the scene, the technician must dilute the luminol solution to a concentration of 6.00×10-2 M . The diluted solution is then placed in a spray bottle for application on the desired surfaces. How many moles of luminol are present in 2.00 L of the diluted spray? Express your answer with the appropriate units. View Availahle Hintie)

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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Part B Read the following problem and then answer the questions. An 85.0-mL aqueous solution contains 7.54 g iron(II) chloride (FeCl2). Calculate the molarity of the solution. 10. Write the expression needed to convert the volume of the solution given in the problem to the volume needed to calculate molarity.
The stock solution in the stock beaker contains 10.00 mL of 0.1000 M iron(III) nitrate solution, 10.00 mL of 0.1000 M potassium thiocyanate solution, and 10.00 mL of 0.5000 M nitric acid solution. What is the total volume of the stock solution? How many moles of iron (III) nitrate are present in the stock solution? How many moles of potassium thiocyanate are present in the stock solution? Based on the moles of iron (III) nitrate and moles of potassium thiocyanate, how many moles of iron (III) thiocyanate do you expect to be formed Once you determine the moles of iron (III) thiocyanate formed, determine the concentration of iron (III) thiocyanate in the final solution.
A 125-ml sample of an 8.9 M NaCl solution is diluted to 3.0 L. What volume of the diluted solution contains 12.8 g of NaCl?
Question &.. 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 titration is performed to determine the amount of sulfuric acid, H2SO4, in a 6.5 mL sample taken from car battery. About 50 mL of water is added to the sample, and then it is titrated with 43.37 mL of a standard 0.5824 molar NaOH solution. You balanced this reaction in a previous problem. How what is the molar concentration of sulfuric acid in the original sample? Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer units
Use the References to access important values if needed for this question. A student weighs out a 6.27 g sample of AlBr3, transfers it to a 100. mL volumetric flask, adds enough water to dissolve it and then adds water to the 100. mL tick mark. What is the molarity of aluminum bromide in the resulting solution? Molarity M %3D
[References] A solution is prepared by dissolving 16.2 g ammonium sulfate in enough water to make 260.0 mL of stock solution. A 35.00-mL sample of this stock solution is added to 60.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions in the final solution. Assume that the volumes are additive. Concentration of ammonium ions = Concentration of sulfate ions = M Suhmit Answer Toy Another Version
Determine the molarity of a solution formed by dissolving 0.918 g of MgI 2 in enough water to yield 50.0 mL of solution. The molar mass of MgI 2 is 278.11 g/mol.0.0936 M0.0660 M0.0297 M0.0107 M0.192 M
Calculate the grams of solute needed to prepare each of the following. Part A You may want to reference (Pages 298 - 305) Section 9.4 while completing this problem. 2.00 L of a 2.00 M NaOH solution Express your answer with the appropriate units. HẢ ? Value Units Submit Request Answer Part B 4.80 L of a 0.195 M CaCl2 solution Express your answer with the appropriate units. HẢ ? Value Units Submit Request Answer
A 225 mL sample of a 10.0 M aqueous stock solution is diluted to 4.00 L upon addition of water. What is the concentration (in M) of the diluted solution?
Volume of HCL sample = 15ml Molarity standardized NaOh solution = .09929 Initial buret reading = 17.85 mL NaOH final buret reading = 36.16 mL NaOH volume of NaOH used = 17.31 Equation HCl = NaOH=NaCl + H2O How many moles of NaOH were used to reach the equivalence point?
A student weighs out a 3.62 g sample of NaCH3COO , transfers it to a 300. mL volumetric flask, adds enough water to dissolve it and then adds water to the 300. mL tick mark. What is the molarity of sodium acetate in the resulting solution? Molarity =______ M
15.0 mL of 17.2 M NaNO3 is diluted to 100.0 mL. What is the molarity of the new solution? __________ M (Report your answer with the correct sig figs in units of moles/ L, M